Chapter 18: Formulas and Names

chemical formula

A combination of chemical symbols and numbers to represent a substance

Ion

A charged atom

chemical bond

the attractive force that holds atoms or ions together

ionic bond

A chemical bond resulting from the attraction between oppositely charged ions.

covalent bond

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

Molecule

A group of atoms covalently bonded together

polar molecule

molecule with an unequal distribution of charge, resulting in the molecule having a positive end and a negative end

nonpolar molecule

molecule that shares electrons equally and does not have oppositely charged ends

binary compound

a compound composed of two elements

oxidation number

the charge of a ion

polyatomic ion

A charged group of covalently bonded atoms