Question

Why is Sulfur Oxide (SO) a covalent bond?

Answer 1

Because they're both nonmetals...

Explanation:

Covalent bonds form mainly between two or more nonmetals. This happens through the sharing of electrons. Any gas molecule made with entirely nonmetals, such as `CO_2`, `CH_4`, `SO_2`, `NO_2`,... are all held together by covalent bonds.

Sulfur and oxygen are both nonmetals due to their position on the periodic table, and so sulfur monoxide or `SO` would just be held by covalent bonding.