Question

Which of the following molecules would one expect to have a non-polar covalent bond?

Answer 1

b. F₂ have a polar covalent bond

Explanation:

The type of bond depends on the difference of the electronegativity of the two elements.

if the electronegativity difference is under 0.4 the bond is non-polar covalent

if the electronegativity difference is between 0.4 and 1.7 the bond is polar covalent

if the electronegativity difference is greater 1.7 the bond is ionic

a. HCl

electronegativity of Cl - electronegativity of H = 3 - 2.2 = 0.8, so the bond is polar covalent

b. F₂

electronegativity of F - electronegativity of F = 4 - 4 = 0 , so the bond is non-polar covalent

c. HF

electronegativity of F - electronegativity of H = 4 - 2.2 = 1.8, in this case because non-metals are involved in the bond we consider this to be a polar covalent bond.

d. ClF

electronegativity of F - electronegativity of Cl = 4 - 3 = 1, so the bond is polar covalent

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type of chemical bonds

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