Question

velancy of atomicity Ca(HCO3)2

Answer 1

Hydrogen gas valency +1 and CO3 has valency -2. Now when u combine them together 1–2=-1 . Hence thevalency of HCO3 is -1. Similar us the case with other compounds like P04 havingvalency -3 , and so on.

Answer 2

valancy is calcium 1

                 hydrogen 2

                   carbon 2

oxygen 6