Ionic Compounds

An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. They typically form between metals and nonmetals.

The charge of a sodium ion (Na) is +1.

The charge of a chloride ion (Cl) is -1.

A polyatomic ion is a charged ion composed of two or more atoms covalently bonded, which can be considered as a single unit.

An example of a polyatomic ion is phosphate, represented as $$PO_4^{3-}$$ .

The formula for Iron (III) Chloride is $$FeCl_3$$ .

To determine the formula of an ionic compound, combine the cation and anion in a ratio that results in a neutral charge.

A cation is a positively charged ion, while an anion is a negatively charged ion.

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons, leading to the formation of stable ionic compounds.

Lattice energy is the energy released when ions in the gas phase combine to form an ionic solid.