1. Binary compound

a compound composed of two different elements

2. Empirical formula

a chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio

3. Formula Mass

the sum of the average atomic masses of all atoms represented in the formula of any molecule, formula unit, or ion

4. Monatomic ion

an ion formed from a single atom

5. Nomenclature

a naming system

6. Oxidation numbers

the number of electrons that must be added to or removed from an atom in a combined state to convert the atom into the elemental form

7. Oxidation state

the condition of an atom expressed by the number of electrons that the atom needs to reach its elemental form

8. Oxyanion

a polyatomic ion that contains oxygen

9. Percentage composition

the percentage by mass of each element in a compound

10. Polyatomic ion

an ion made of two or more atoms

11. Salt

an ionic compound that forms when a metal atom or a positive radical replaces the hydrogen of an acid