Ionic Bonding

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions, typically between a metal and a nonmetal.

A cation has a positive charge.

An anion has a negative charge.

The formula is $$Al_2O_3$$ .

The formula is $$Na_2S$$ .

The cation is always a metal.

The formula is $$Al_2S_3$$ .

Valence electrons are the outermost electrons that are transferred from one atom to another during the formation of ionic bonds.

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons, leading to stability.

To determine the formula, balance the total positive and negative charges of the cations and anions.