Nomenclature Unit Vocabulary Words
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| percent composition | The percent by mass of each element in a compound.
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| empirical formula | A formula with the lowest whole-number ratio of elements in a compound.
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| molar mass | A general expression used to refer to the mass of a mole of any substance.
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| ionic compound | Compound composed of positive and negative ions.
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| molecular compound | Compound composed of molecules.
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| monatomic ion | A single atom with a positive or negative charge as a result of losing or gaining valence electrons.
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| polyatomic ion | A tightly bound group of atoms that behaves as a unit and carries a charge.
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| anion | Any atom or group of atoms with a negative charge.
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| cation | Any atom or group of atoms with a positive charge.
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| ion | An atom or group of atoms that has a positive or negative charge.
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| binary compound | A compound composed of two elements.
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| chemical formula | Shows the number and type of atoms present in the smallest representative unit of a substance. (Ex: NH3)
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| ternary compound | A compound containing atoms of three different elements, usually containing at least one polyatomic ion. (Ex: Na2CO3)
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| anion | Fluorine with a -1 charge (anion or cation?)
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| cation | Beryllium with a +2 charge (anion or cation?)
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| monatomic ion | Phosphorus with a -3 charge (monatomic ion or polyatomic ion?)
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| polyatomic ion | (PO4) with a -3 charge (monatomic ion or polyatomic ion?)
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