Question

how does valency of carbonate occurs​

Answer 1

Explanation:

Valency is the number of univalent atoms (e.g., H or Cl atoms) that can combine with an atom or an ion. Each O atom has a negative charge, so it can combine with an H+ ion to form carbonic acid. Since carbonate can combine with two H atoms, its valency is two.

Answer 2

Answer:

3

Explanation:

Carbonate ion occurs only in 3