How to tell if a bond is ionic or covalent?

Answer 1

if you have a metal and non metal bonding it's an ionic bond and if it's two non metals it would be a covalent bond.

Answer 2

One way to determine if a bond is ionic or covalent is to look at the electronegativity difference between the two atoms. If the difference is large (greater than 1.7), the bond is likely ionic. If the difference is small (less than 1.7), the bond is likely covalent. Additionally, ionic bonds typically form between a metal and a nonmetal, while covalent bonds form between two nonmetals.