Sulfur has six valence electrons and potassium has one valence electron. The electronegativity difference between the two elements is 1.76.
How can the octet rule be used to explain the bonding of potassium and sulfur?

A. Sulfur needs access to two electrons to reach a full octet. Each potassium atom has one valence
electron that it prefers to lose to obtain a full octet. Therefore, two potassium
atoms share
electrons and form a covalent bond.

B. Sulfur needs to lose six electrons to reach a full octet. Each potassium atom needs access to
seven electrons to achieve a full octet. Sulfur and potassium share six electrons, forming a
covalent bond.

C. Sulfur needs to lose six electrons to reach a full octet. Each potassium atom needs access to
seven electrons to achieve a full octet. One sulfur atom donates all its electrons to potassium,
forming an ionic bond.

D. Sulfur needs access to two electrons to reach a full octer Each potassium atom has one valence
electron that it prefers to lose to obtain a full octet. Therefore, two potassium atoms and one
sulfur atom complement each other and form an ionic bond,