c101_f10_1011 - More on ions (Chapters 2.1 and 3.5 3.7)...

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More on ions (Chapters 2.1 and 3.5 – 3.7) Ion : an atom or molecule that has a net electrical charge. Examples: Na + (sodium ion), Cl - (chloride), NH 4 + (ammonium). Anion : a negative ion, formed when electrons are added to a neutral atom or molecule. An anion of an atom is given a new name. The new name is based on the element name and given the “-ide” ending. Examples : Cl - (chlor-ide), O 2- (ox-ide). Cation : a positive ion, formed when electrons are removed from a neutral atom or molecule. A cation of an atom is not given a new name. Instead the word “cation” is added. Examples : Na + (sodium cation), Mg 2+ (magnesium cation)
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Chemistry 101 Fall 2010 Polyatomic ion : an ion composed of more than one atom, an ion of a molecule (Table 3.7). Examples : SO 4 2- (sulfate), NH 4 + (ammonium). Like charges repel each other (positive charge repels positive charge, negative charge repels negative charge), so a collection of only cations (positives) or only anions (negatives) is unstable. Opposite charges attract each other (positive
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This note was uploaded on 03/05/2011 for the course CHEM 101 taught by Professor Scottnickolaisen during the Fall '11 term at California State University Los Angeles .

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c101_f10_1011 - More on ions (Chapters 2.1 and 3.5 3.7)...

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