The structure of an ionic compound in which ions are packed together into a repeating array (regular order or arrangement)
Crystal lattice
An element or compound that cannot be broken down into simpler components without losing the properties of the original substance.
Substance
A substance made of two or more atoms held together by the sharing of electrons.
Molecule
A substance in which the atoms of two or more different elements are held together by sharing or transferring electrons, in a fixed ratio.
Compound
A positive or negative number that indicates how many electrons an atom can lose or gain to form a bond with another atom. (You can use column number to help you) ex: Sulfur gains 2 electrons and forms the anion S2−.
Oxidation number