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Ch.7 Vocab Chem
Mr Atkins 2013
Term | Definition |
---|---|
Monatomic ions | ions formed from a single atom |
subscripts | indicates the number of atoms in a molecule of octane |
binary | compounds composed of two elements |
nomenclature | the naming system of ionic compounds |
cation | positively charged ion |
anion | an ion that has a negative charge |
stock system | naming ions using roman numerals |
polyatomic ions | a charged group of covalently bonded atoms |
oxyanions | polyatomic ions that contain oxygents , -ate, -ite |
acid | based on properties when mixed with water |
salt | ionic compound composed of a cation and the anion from an acid |
oxidation number | indicates general distribution of electrons among the bonded atoms in a molecular compound or polyatomic compound |
formula mass | sum of the atomic masses of all atoms represented in its formula |
molar mass | sum of the masses of the elements present in a mole of the molecules or formula units that make up that compound |
empirical formula | consists of the symbols for the elements combined in a compound, with subscripts showing the smallest whole-number mole ratio of the different atoms in the compound |
molecular formula | the actual formula of a molecular compound |