covalent bond?

Question

Which of the following bonds would you expect to be covalent

1) N--O
2) Cs--O
3) Na--Cl
4) Ca--O
5) S--H

Answer 1

Nothing with a metal and nonmetal combined would give you a covalent bond. Those would be ionic bonds. Look for the ones with no metals.

1, 5 have no metals so they have covalent bonds.

2, 3, 4 have metals so they have ionic bonds.

Answer 2

1 and 5 Both are polar covalent bonds