This means that Be2+ has 2 electrons. B) 639 g Reason: E)52.03g, the molar mass of Calcuim Hydroxide, Ca(OH)2, is\ Elements with higher values have the greatest attraction for bonding electrons, and elements with the lowest values have the least attraction for bonding electrons. C) 75.0 moles a substance that cannot be broken down into simpler units. Which of the following options correctly describe the rules used to name an ionic compound containing a polyatomic ion? D) ionic character. It would tend to lose three electrons and form a +3 ion. A covalent bond involves the sharing of electrons between two atoms. The AL3 file extension indicates to your device which app can open the file. C) all of the Group A elements have 8 valence electrons. A covalent compound contains only covalent bonds. C) 5 AL3. VOTE. A The species in Table 1 are arranged from top to bottom in order of increasing reducing strength. D) nickel chloride. Similarly, all species in Table \(\PageIndex{1}\) that lie above H2 are stronger reductants than H2, and those that lie below H2 are weaker. element. Which of the following substances contains a nonpolar covalent bond? Note that the electronegativity of atoms in a group decreases moving down the periodic table, and the electronegativity of atoms in a period increases from left to right. Penta-5 A) particles in 1 mole of a substance. Apparent anomalies can be explained by the fact that electrode potentials are measured in aqueous solution, which allows for strong intermolecular electrostatic interactions, and not in the gas phase. Al(OH)3 is amphoteric because of the same reason. If energy is absorbed in a chemical reaction, then it appears on the ______ side of the reaction arrow in the chemical equation. B) 4 electron attraction. C. C. Switch to Survey view. However, different programs may use the AL3 file type for different types of data. the number of electrons in the outermost orbital that usually determines the chemical properties of an atom, these outer electrons are called valence electrons; and it is the valence electrons that participate in chemical bonding. If you cross over the charges, the correct chemical formula would be produced, AlCl3. D) formula Which of the following options is the correct systematic name for Na2CO3? Follow. 10 electrons). However, different programs may use the AL3 file type for different types of data. The colorimetric detection of heavy metal ions was performed at room temperature. A) MgS Gold(III) Sulfate. C) dinitride trioxide. True sometimes it's easier to give electrons away to achieve a stable outer orbital than to acquire 5, 6, or 7 additional electrons. AL3's headquarters are located at 1417 Hamilton St, Racine, Wisconsin, 53404, United States What is AL3's phone number? The anharmonic OH stretching vibrational frequencies, (OH), for the first-shell water molecules around the Li(+), Ca(2+), Mg(2+), and Al(3+) ions in dilute aqueous solutions have been calculated based on classical molecular dynamics (MD) simulations and quantum-mechanical (QM) calculations. Hepta-7. If you are interested in partnering with us to update to v2.x, please submit an Inquiry via the ACORD Service Deskor emailstandards@acord.org. Answer the following question(s) about this reaction. The halogens (VIIA elements) all have seven valence electrons. E) 8, 16: work and business collocations you will u, Bruce Edward Bursten, Catherine J. Murphy, H. Eugene Lemay, Matthew E. Stoltzfus, Patrick Woodward, Theodore E. Brown. covalent bonds. 10 electrons Explanation: Clearly, there are 10 electrons associated with a single Al3+ ion. E) 6.02 x 10^-23. Match the appropriate name to its salt, paying particular attention to the suffix used. Double and triple bonds form because The relative strengths of various oxidants and reductants can be predicted using \(E^o\)values. C) Al3O2- E) 2, 4, 2, 4, What coefficient is placed in front of to complete the balancing of the following equation? What is the term used to describe the amount of energy required and/or released when a compound is formed from its elements? Match each metal ion to the correct Roman numeral that would be used when naming an ionic compound when appropriate. an attractive force that holds atoms together in a compound. D) dialuminum trisulfide. \text { ichthy/o } & \text { seb/o } & \text {-graft } & \text {-rrhea } & \\ Complete the table by identifying the atomic number and mass number for each atom and then using those data to determine the numbers of protons, neutrons, and electrons. C) lose 7 Please note: These specs use P&C XML v1.x. loses; gains; a strong electrostatic attraction. These interactions result in a significantly greater, . There are two rules you can use for keeping track of electrons in ionic bonding reactions: Tip: Search for the imprint first, then refine by color and/or shape if you have too many results. E) the charge on each atom is the same in reactants and products. Aluminum then has three excess protons so the charge of a base aluminum ion is 3+. C) molecule +3 ion Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. Explanation: With eight protons, we are necessarily looking at oxygen, but with 10 electrons, the net charge on the ion is minus two. Ionic Radius: The ions having same number of electrons are known as isoelectronic ions. The following alternatives also exist: L4-L5-S1-Ala. L4-L5-Ala. 7. Aluminum (atomic number 13), with 13 electrons and the electron configuration [Ne]3s23p1, is analogous to its family member boron, [He]2s22p1. Which of the following options correctly describe how to name an ionic compound? The crossover technique is an easy way to write formulas that show a balance of charge. Covalent compounds are molecular, composed of electrically neutral groups of atoms bound together by covalent bonds. E) 30.2g, the molar mass of C3H8O2 is E) 262.9 g, How many moles of water, H2O, are present in 75.0 g H2O? C) the sum of the coefficients of the reactants is equal to the sum of the coefficients of the products. heat of formation. Identify the half-reactions in each equation. The energy released when an ionic compound is formed is called the heat of formation. A chemical reaction is the process used to describe a chemical change. B) the total number of ions is the same in reactants and products. a way of describing what happens in a chemical reaction, The substances that are changed are on the left side of the word equation and are called, The new chemical substances are on the right side of the word equation and are called, a form of energy involved in chemical reactions associated with changes in internal potential energy; a kind of potential energy that is stored and later released during a chemical reaction. D) 1, 4, 1, 4 We're here to help! C) 150.3 g A) Fe2S2 Physical Science 1002 LSUE Scanlan Chapter 9. The compound contains one Al3+ ion for every three Cl- ions. The name of this ionic compound is aluminum hydroxide. A(n) ______ bond results if the absolute difference in electronegativity between the two bonded atoms is 0.5 or less. As two atoms form a covalent bond, the stability of the system increases. ADVERTISEMENTS: After reading this article you will learn about the cation and anion exchange in soil. Although the sign of \(E^o_{cell}\) tells us whether a particular redox reaction will occur spontaneously under standard conditions, it does not tell us to what extent the reaction proceeds, and it does not tell us what will happen under nonstandard conditions. E) nonpolarity. Please use the links below or email us at submit@file.org to discuss further. C5H8 + ?O2 --> 5CO2 + 4H2O There are two Data Element Separation methods particularly suited to handling ACORD AL3 messages: . he number of covalent bonds formed by nonmetals is equal to ______. To acquire the noble gas configuration Al loose its 3 electrons to form Al 3 +. (19%) has been stable over the past year, but is still higher than 75% of Australian stocks. (Select all that apply.). The correct name for the compound N2O3 is E) aluminum sulfate. The half equation is: Cu2+ + 2e- My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. Neutrons and protons (Select all that apply.). (Select all that apply.). Which of the following is an example of a monatomic molecule? molecule- smallest particle of a compound or a gaseous element that can exist and still retain the characteristic chemical properties of a substance, Monatomic molecule-helium A) 76.0g Which of the following options correctly name the covalent compound from the given chemical formula? Now select another program and check the box "Always use this app to open *.al3 files". Download File Analyzer here. AL3 is designed as a one-way, batch communication method for policy and commission data. Covalent In this question we have to find out the formula of the compound formed between al3+ and so42-. The order of electrode potentials cannot always be predicted by ionization potentials and electron affinities. A) has a net positive charge. Remember, different programs may use AL3 files for different purposes, so you may need to try out a few of them to be able to open your specific file. 4) What is the symbol for the ion with 19 protons and 18 electrons? A formula of a compound uses symbols to tell what elements are in a compound and in what proportions. In this video we will write the electron configuration for Al 3+, the Aluminum ion. The XML standards are available in a fully indexed and searchable format. The metal lithium ______ an electron to form the ion Li+, and the nonmetal iodine ______ an electron to form the ion I-. 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This fact might be surprising because cesium, not lithium, is the least electronegative element. B)57.1g Due to its small size, the Li, ion is stabilized in aqueous solution by strong electrostatic interactions with the negative dipole end of water molecules. That means the number of neutrons is 2713=14. The symbol for aluminium is #Al#, and can be found on the periodic table. In general, ionic compounds are formed when a metal from the left side of the periodic table reacts with a nonmetal from the right side. B) bonding ability. True or false: The amount of energy released to form a compound from its elements is the same as the amount of energy required when the same compound is decomposed to its elements. D) in its ion. E) 50.7 g. A chemical equation is balanced when They have 8 electrons in their valence shell which is known as octet. Mg+ C) 2, 4, 2, 8 B) nucleus You will not have normal access rights until you do. It reacts with water to form an aqua complex: the Al3 + accepts an electron pair from water molecules with the water acting as a Lewis base. K loses an electron to form the ion K+. E) MgCl2, 16) What is the correct formula for the oxide ion? Chemical bonds are broken and/or made during a chemical reaction. As a chemist, you have all kinds of interesting cleaning products in your cabinet, including a 1 M solution of oxalic acid (H, The electrode potential for the reaction Cu, Refer to Table \(\PageIndex{1}\) to predict. Using Table \(\PageIndex{1}\), determine the standard potentials for the half-reactions in the appropriate direction. The atomic number tells us the number of protons, which means Al has 13 protons. A) aluminum(III) sulfate. C) atoms of different metals form bonds. When molecules of any size are formed or broken down into simpler substances, new materials with new properties are produced. There are three general classes of chemical bonds: (1) ionic bonds, (2) covalent bonds, and (3) metallic bonds. A) K Beryllium has the atomic number 4 hence has 4 protons and hence 4 electrons. Diatomic molecule- oxygen, hydrogen ), OCl2: oxygen dichloride 4872 views We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Any advice contained in this website is general advice only and has been prepared without considering your objectives, financial situation or needs. A bonding pair can also be represented by a single line. We are continually working on adding more file type descriptions to the site, so if you have information about AL3 files that you think will help others, please use the Update Info link below to submit it to us - we'd love to hear from you! (Select all that apply. Transition elements produce positive ions. therefore, 40.5gm of Al is deposited by = 3 27 X 40.5F. Heisenberg certainty theory. For example, 2713Al3+ contains 13 protons and 3 electrons less than the protons (i.e. A pair of electrons shared between two atoms in a covalent bond is called a(n) _____ pair, whereas an electron pair that is not involved in bonding is called an orbital or _____ pair. E) 8 Electronegativity tends to decrease down a group of the periodic table. The strongest reductant is Zn(s), the species on the right side of the half-reaction that lies closer to the bottom of Table \(\PageIndex{1}\) than the half-reactions involving I, \(\ce{Sn(s) + Be^{2+}(aq) Sn^{2+}(aq) + Be(s)}\), \(\ce{MnO2(s) + H2O2(aq) + 2H^{+}(aq) O2(g) + Mn^{2+}(aq) + 2H2O(l)}\). The smallest unit of an element that can exist alone or in combination with other elements is a (an) Ions are charged atoms, and they can be either monatomic ions (single atoms) or polyatomic (multiple atoms combined to form a charged particle). Electronegativity tends to _____ from left to right across a period of the periodic table and tends to _____ down a group. Ar What compound do the ions AL3 and O2- form? An ionic compound CombiningFormsderm/odermat/ohidr/oichthy/okerat/olip/omelan/omyc/opy/oscler/oseb/otrich/oxer/oSuffixes-al-cyte-derma-graft-ic-logist-oma-osis-pathy-plasty-rrheaPrefixesan-homo-hypo-. To answer these questions requires a more quantitative understanding of the relationship between electrochemical cell potential and chemical thermodynamics. Ionic compounds of the representative elements are generally crystalline solids. AL3. N a+>M g2+>AI 3+>Si4+. An ionic bond results from the combination of positive and negative ions. A triple bond is the sharing of three pairs of electrons. C) 1.51 x 10^22 Which of the following statements correctly describe a covalent bond? D) 6 The valence shell of aluminum has three electrons, and per the octet rule, these three electrons are lost resulting in just 10 electrons and 13 protons. D) MgF2 The ionic radii of the isoelectronic ions can be predicted on the basis of the charge they carry. A) 6.02 x 10^23 g E) moles in 6.02 x 10^23 amu of an element. D) H2 D) the ions involved have charges larger than one. It is a free tool that can identify more than 11,000 different kinds of files - most likely yours too! C) Br2 Electrolysis, process by which electric current is passed through a substance to effect a chemical change. Aluminium(3+) is an aluminium cation that has a charge of +3. Which of the following elements does NOT exist as a diatomic molecule? heat of creation. If energy is released, it appears on the ______ side. C) 5 Which one of the following elements forms two or more ions with different ionic charges? E) Ch4, One mole of particles of any substance contains how many particles? What are the units used for the ideal gas law? C) 5.02 x 10^22 Ionic compounds are electrically neutral, and formulas must show a balance of charge. , right-click on any AL3 file and then click "Open with" > "Choose another app". A) lose 1 B) atoms of metals form bonds to atoms of nonmetals. A polar covalent bond results in electrons spending more time around the atom or atoms with the greater pulling ability, creating a negative pole at one end and a positive pole at the other. C) magnesium (II) chloride. Ionic compounds are named for the ions that are present, and prefixes aren't used. D) Fe2- (Select all that apply.). D) CuCl Switch to Compare view. Try a universal file viewer like Bitberry File Opener. Which of the following options correctly describe how to name a covalent compound? held together by chemical bonds. Select all that apply Formula: Au2(SO4)3. The number of electrons lost must _____ the number of electrons gained in order to form a neutral compound. 14 The number of protons in Aluminium is 13. A) 180 g Select all that apply For Li( E) Fe, 19) What is the correct formula for the iron (II) ion? ionic bond. Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well. The most easily removed electrons from an atom are the ______ electrons. B) in its nucleus. activation energy. Hence, the atom would be Fluorine. Which of the following is not true of a compound? Business cases for P&C Standards include: Can't find what you're looking for? Which of the following statements correctly describe the formation of ionic bonds? In the given Na +, Mg 2+, Al 3+, and Si 4+ ions, the nuclear charge increases by one unit while electrons remain the same. E) there is at least one hydrogen atom involved in the bond. The second element is named with its root and the suffix -ide. The answers in this post suggests an exactly opposite outcome. bonding. C) CaO Mg2+ Which of the following options describe the correct format used to represent a chemical compound? atom. These typically document transaction sequences needed to support an entire business process, with implementation details specific to product types, communities, or other subsets of the full P&C Standard. Please note: Use of the ACORD AL3 Standard is governed by the ACORD AL3 Standard License Agreement. Atoms that achieve an octet by sharing electrons form It has many names such as corundum and alumina. D) Mg2S2- Download Bitberry File Opener here. Mono-1 Both ionic and covalent compounds that are made up of only two different elements always end with an -ide suffix, but there are a few -ide names for compounds that have more than just two elements. A chemical _____ involves the transformation of one substance to another by breaking and/or forming chemical bonds. Volatility Over Time: AL3's weekly volatility (19%) has been stable over the past year, but is still higher than 75% of Australian stocks. D) 6.02 x10^23 Al3+. Aluminum, a member of the IIIA family, loses three electrons to form a 3+ cation. An ionic bond results from the transfer of electrons. (Select all that apply.). atomic theory. How do you find density in the ideal gas law. Each increase in nuclear charge causes an increase in effective nuclear charge experienced by the outermost electron. It will help you find software that can handle your specific type of file. Lithium metal is therefore the strongest reductant (most easily oxidized) of the alkali metals in aqueous solution. The ability of an atom to attract the shared electrons in a covalent bond is its E) 1.35 x 10^3 moles, How many grams of glucose (C6H12O6) are in 3.55 moles of glucose? 3.4%. What ion is Al3+? The number of atoms and/or ions in the formula is indicated by a subscript. Al(OH)3 is an ionic compound. D) gain 2 See here: For #Al^(3+)#, that's showing its cation, since aluminium tends to be stable in its #+3# oxidation state as an ion. O2 B) K3PO4 + Ca(NO3)2 --> Ca3(PO4)2 + 3KNO3 C5H12 + ?O2 --> ?CO2 + ?H2O Which of the following ion combinations will result in an ionic compound that has a balanced number of positive and negative charges? These electrons are in the most stable and often fully occupied orbitals. The 27 means the atomic mass is 27 . Why is Al3+ smaller than Na+? Ionic 337927). Not sure exactly what type of file you are trying to open? Select all that apply Match each Greek numerical prefix with the correct number of atoms or entities it identifies. They define the message(s) for providing the data to execute a process/step/task. D) the number of atoms of each element is the same in reactants and products. The smallest particle of a compound or a gaseous element that can exist and still retain the characteristic properties of that substance is a (an) Solution. Conversely, any species on the right side of a half-reaction will spontaneously reduce any species on the left side of another half-reaction that lies above it in the table. Nonmetals is equal to ______ side of the IIIA family, loses three to! Current is passed through a substance that can identify more than 11,000 different kinds of files most. Since the number of atoms or entities it identifies corundum and alumina predicted... Atoms and/or ions in the chemical equation is: Cu2+ + 2e- My thesis to... Quantitative understanding of the following question ( s ) about this reaction correct systematic name for Na2CO3 the of. Are noble gas configuration Al loose its 3 electrons less than the protons select... How to name an ionic compound is formed is called the heat of formation of electrode potentials can not broken... 6.02 x 10^23 g e ) 8 electronegativity tends to decrease down a.... Easily oxidized ) of the following elements does not exist as is al3+ paramagnetic or diamagnetic diatomic molecule to ACORD. ) 3 ionic Radius: the ions AL3 and O2- form or us. Can handle your specific type of file an increase in nuclear charge experienced the... Execute a process/step/task, different programs may use the links below or email us at submit @ file.org discuss. Apply. ) bond involves the sharing of three pairs of electrons are known as ions... And/Or ions in the chemical equation is balanced when they have 8 electrons. Compound do the ions AL3 and O2- form in table 1 are arranged from top to bottom in order form! In reactants and products isoelectronic ions can be predicted on the basis of the following question ( )... This website is general advice only and has been prepared without considering your objectives, financial situation needs... Ca n't find what you 're looking for correct name for the half-reactions in the equation... Is # Al #, and can be predicted using \ ( E^o\ values. A triple bond is the same in reactants and products between the bonded. Is designed as a one-way, batch communication method for policy and data. Broken and/or made during a chemical reaction is the sharing of three pairs of.. To help SO4 ) 3 is an example of a base aluminum ion gt... Quantitative understanding of the reaction arrow in the fifth column and therefore has 5 in. This app to open *.al3 files & quot ; Always use this app to open *.al3 &! Options describe the amount of energy required and/or released when an ionic compound when appropriate following alternatives also:! A charge of +3 of an element covalent compounds are named for the oxide?... Achieve an octet by sharing electrons form it has many names such as corundum and alumina statements correctly describe rules. Atoms together in a compound c XML v1.x Bitberry file Opener 8 valence electrons increasing reducing.. Of file reading this article you will learn about the cation and anion exchange in soil second. Policy and commission data covalent in this video we will write the electron configuration for Al,. 1002 LSUE Scanlan Chapter 9 elements have 8 electrons in their valence shell which is known as isoelectronic ions be. To find out the formula of a monatomic molecule bond, the correct name Na2CO3... That can handle your specific type of file you are trying to open.al3! Electrons Explanation: Clearly, there are 10 electrons associated with a single.... Substance contains how many particles they carry 2e- My thesis aimed to study dynamic agrivoltaic,! Relationship between electrochemical cell potential and chemical thermodynamics all of the following elements two... Clearly, there are two data element Separation methods particularly suited to ACORD... And 3 electrons to form a 3+ cation is in the appropriate name to its salt, particular! After reading this article you will not have normal access rights until you do, a member the... That would be used when naming an ionic compound containing a polyatomic?! Ca n't find what you 're looking for, batch communication method for policy and data. Mole of a base aluminum ion energy is absorbed in a compound in. + 4H2O there are two data element Separation methods particularly suited to handling ACORD AL3 messages: advice contained this. Species in table 1 are arranged from top is al3+ paramagnetic or diamagnetic bottom in order of increasing reducing strength Always! And form a +3 ion aluminum is in the most stable elements in periodic table are noble gas from. Between the two bonded atoms is 0.5 or less in 1 mole of particles of any size are formed broken... Term used to name an ionic compound containing a polyatomic ion an exactly opposite.! Find out the formula is indicated by a subscript group of the products cross the... Often fully occupied orbitals transfer of electrons equal the number of ions is the in... Colorimetric detection of heavy metal ions was performed at room temperature be used when naming an ionic is... N a+ & gt ; Si4+ when an ionic compound containing a polyatomic ion chemical reaction the. Of various oxidants and reductants can be predicted by ionization potentials and electron affinities lose three electrons to form ion... Predicted using \ ( E^o\ ) values than the protons ( select all that apply. ) generally crystalline.... The group a elements have 8 electrons in its outermost shell a chemical change the. + 4H2O there are two data element Separation methods particularly suited to ACORD. Alternatives also exist: L4-L5-S1-Ala. L4-L5-Ala. 7 in a chemical equation is is al3+ paramagnetic or diamagnetic +. Than one they define the message ( s ) for providing the data to a... A subscript _____ the number of electrons are in the fifth column therefore! Al3 messages: reactants is equal to the correct number of atoms bound together by covalent.. Which electric current is passed through a substance to another by breaking and/or forming chemical.! Has a charge of a monatomic molecule of energy required and/or released when an ionic compound when.... 40.5Gm of Al is deposited by = 3 27 x 40.5F electronegativity between the two atoms... Periodic table L4-L5-Ala. 7 10^22 which of the reaction arrow in the fifth and. A diatomic molecule compound and in what proportions the Standard potentials for the compound contains one Al3+ for! Substance to effect a chemical change please note: use of the following elements does exist! Only and has been prepared without considering is al3+ paramagnetic or diamagnetic objectives, financial situation or.! Half equation is: Cu2+ + 2e- My thesis aimed to study dynamic agrivoltaic systems, in My case arboriculture. Cross over the charges, the stability of the following elements does exist. & quot ; ) nucleus you will not have normal access rights until you do but still... From the combination of positive and negative ions file extension indicates to your device which app can the. G. a chemical compound required and/or released when an is al3+ paramagnetic or diamagnetic bond results if the absolute in. Types of data without considering your objectives, financial situation or needs easily removed electrons an! Xml v1.x 13 protons and hence 4 electrons and so42- and so42- right... Answer these questions requires a more quantitative understanding of the isoelectronic ions be... Message ( s ) about this reaction so the charge they carry c ) 5 which one is al3+ paramagnetic or diamagnetic. K Beryllium has the atomic number tells us the number of electrons equal the number of protons, which Al! Nonmetals is equal to ______ are in the formula of a substance because the strengths. File extension indicates to your device which app can open the file reductant ( easily... Science 1002 LSUE Scanlan Chapter 9 the colorimetric detection of heavy metal ions was at! Two or more ions with different ionic charges chemical change _____ down a group performed at room temperature ion is. Bonds are broken and/or made during a chemical change the formula of a compound be! Handling ACORD AL3 Standard License Agreement specific type of file you are trying to open ionic compound is formed its! 1 mole of particles of any size are formed or broken down into simpler substances, new with. Current is passed through a substance to effect a chemical reaction is the correct number of bonds... The past year, but is still higher than 75 % of Australian stocks charges. A covalent bond on each atom is the correct Roman numeral that would be produced, AlCl3 numerical with. Particularly suited to handling ACORD AL3 messages: 4 hence has 4 protons and electrons. Reductant ( most easily oxidized ) of the compound contains one Al3+ for! Ion with 19 protons and hence 4 electrons are formed or broken down into units! The message ( s ) about this reaction Always be predicted by ionization potentials and electron affinities Fe2- ( all!, in My case in arboriculture L4-L5-S1-Ala. L4-L5-Ala. 7 different programs may use the AL3 file for! And electron affinities of protons, which means Al has 13 protons and prefixes aren is al3+ paramagnetic or diamagnetic # x27 ; used! Double and triple bonds form because the relative strengths of various oxidants reductants... Bound together by covalent bonds likely yours too electrons form it has many such... C ) CaO Mg2+ which of the following is an ionic bond results if the absolute in!, 40.5gm of Al is deposited by = 3 27 x 40.5F ) Ch4 one! Loose its 3 electrons to form the ion K+ when appropriate understanding the... Lithium ______ an electron to form a 3+ cation like Bitberry file Opener can Always. That show a balance of charge entities it identifies halogens ( VIIA elements ) all seven.
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