Which of the following occurs when a covalent bond forms? which of the following occurs when a covalent bond forms? partial charges on polar molecules interact. electrons in valence shells are shared between atoms. nonpolar molecules are pushed together by surrounding water molecules. electrons in valence shells are transferred from one atom to another.

Option (b) is the correct answer.

Explanation:

A covalent bond is defined as the bond which occurs due to sharing of electrons between the combining atoms.

Generally, a covalent bond is formed between non-metals.

For example, both nitrogen and oxygen atoms are non-metals and they combine covalently to form compound.

As nitrogen has 5 valence electrons and an oxygen atom has 6 valence electrons. So, there occurs unequal sharing of electrons between the two.

Thus, we can conclude that when a covalent bond forms then electrons in valence shells are shared between atoms.