# What is the ionic bond formation of calcium and sulfur?

Feb 2, 2014

In the ionic bond formation between calcium and sulfur, a calcium atom donates two valence electrons to a sulfur atom to form a $\text{Ca"^"2+}$ ion and an $\text{S"^"2+}$⁻ ion.

#### Explanation:

A Ca atom has two valence electrons. It can achieve a noble gas configuration by losing these two electrons.

(From Quora)

A sulfur atom has six valence electrons. It can achieve a noble gas configuration by gaining two electrons.

If Ca gives two electrons to S, both ions have a noble gas configuration.