Question

What is the electronegativity difference between the hydrogen and chlorine atoms in an HCl molecule, and what type of bond do they form?

Answer 1

The electronegativity value for hydrogen is 2.1, while for chlorine it is 3.16. The electronegativity difference between hydrogen and chlorine in an HCl molecule is:3.16  Cl  - 2.1  H  = 1.06Since the electronegativity difference is between 0.5 and 1.7, the bond formed between hydrogen and chlorine in an HCl molecule is a polar covalent bond.