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NO2 is a acidic gas. Nitrogen shows +4 oxidation number.
A cation has a number of electrons lower than a neutral atom.
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4 bonding electrons, 16 nonbonding electrons
Fluorine's oxidation number is -1. Since there are four fluorine atoms, the total oxidation number for the fluorine portion of the molecule is -4. The carbon atomwould have to have an oxidation number of +4 so that the compound would have an overall oxidation number of 0.
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BaCl2 should have the Fluorite structure, along with CaF2 and PbO2.The cation coordination number is 8The anion coordination number is 4
Oxygen almost always keeps an oxidation number of -2. Since the overall ion has a charge of -1 you just have to balance the ion. 2*-2 for the oxygen = - 4 In order for the overall charge to be -1, the chlorine must have a +3 oxidation numbers.
Because it's how many times the number has to be added to reach the overall value. e.g. 4 / 0.2 = 20
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The protons in an atom have a positive charge and the electrons in an atom have a negative charge and these balance each other. Neutrons have no charge so they do not factor into it. It would be like adding positive 4(Protons) and negative 4(Electrons). -4+4=0 The zero represents your "no overall charge".