Question

The three elements calcium, strontium and barium have the following similarities:

A. All are metals

B. Each has an oxide that is alkaline in nature

C. Each has valency 2

D. All of the above​

Answer 1

Answer:

D. All of the above

Explanation:

The Group 2 alkaline earth metals include Calcium, Barium, Strontium and are soft, silver metals All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2.