Question

question 38 of 60
which of these compounds has a polar covalent bond?
hf
$i_2$
mgo
kcl
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Explanation:

1. HF: Hydrogen and fluorine are nonmetals with a large electronegativity difference, forming a polar covalent bond where electrons are shared unequally.
2. I₂: Two identical iodine atoms have no electronegativity difference, forming a nonpolar covalent bond.
3. MgO: Magnesium (metal) and oxygen (nonmetal) form an ionic bond via electron transfer.
4. KCl: Potassium (metal) and chlorine (nonmetal) form an ionic bond via electron transfer.

Answer:

A. HF