Question

In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium sulfide?

Answer 1

0

Step-by-step explanation:

Calcium sulfide has molecular formula CaS. Calcium is a metal of group 2, and sulfur, a nonmetal of group 6, and they form an ionic compound, not a molecule.

So, calcium will give 2 electrons to sulfur, so both of them will have 8 electrons in their valence shell. All these electrons will be in pairs, so there will be 0 lone pairs of electrons.

Answer 2

Calcium sulfide is ionic, not molecular.
The answer is D which is four Ca has given up 2 electrons to sulfur with six which makes 8 e-, or 4 pairs.