Question

Formula of the carbonate of a metal M is M2CO3 . Write formula of its oxide

Answer 1

Answer:

M2O is the formula of its oxide.

Answer 2

The chemical formula of the oxide of metal M will be $M_{2} O$.

• The formula of carbonate of metal M is given as $M_{2} CO_{3}$
• The charge on the carbonate ion is (-2) so, its valency will be '2'.
• So the valency of metal M comes out to be '1'.
• The charge on oxide ion is (-2). Therefore, its valency will be '2'.
• Hence, the formula of the metal oxide of metal 'M' will be $M_{2} O$.