Which of the following explains how polar molecules form?

A. Electrons are more attracted to one of the atoms involved in a bond.

B. The two atoms in a bond share electrons equally.

C. One atom transfers its electrons to another atom.

D. Protons are more attracted to one of the atoms involved in a bond.

Question

Shannon

Biology

22 November, 16:31

Which of the following explains how polar molecules form?

A. Electrons are more attracted to one of the atoms involved in a bond.

B. The two atoms in a bond share electrons equally.

C. One atom transfers its electrons to another atom.

D. Protons are more attracted to one of the atoms involved in a bond.

+4

Answers (1)

Know the Answer?

Moyer · Answer 1

The answer is A. It'ss based on electronegativity (not sure if this is covered before A level) but essentially in the covalent bond, the bonding electron pairs are more attracted towards one of the atoms than the other. This creates a slight difference in charge.

So for instance in water, the oxygen is greedy and pulls the bonding electron pair away from hydrogen, closer to itself. This gives the oxygen molecule a slightly negative charge and the hydrogens a slight positive charge.