Which of the following gives the correct Lewis dot representation of the calcium ion in the ionic compound calcium chloride?

a. [ Ca: ]

b. [ Ca ]2+

c. No right choice.

The correct answer is option a. [ Ca: ]

Explanation:

The Lewis dot representation, also known as the Lewis electron dot diagram, represents valence electrons of an atom by using dots around the symbol of the element. The calcium ion in the ionic compound calcium chloride has two valence electrons, therefore the lewis dot representation is comprised of the symbol of calcium "Ca" with two dots ":" around the symbol, representing the two valence electrons of the ion.