CAN SOMEONE EXPLAIN? Thanks. Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. Subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond.
Electronegativity difference of C and C: ⇒ 0.0
ionic
covalent
Electronegativity difference of Mg and Cl:
ionic
covalent