What is the valency of Calcium carbonate?

Valency

• The valency of an atom refers to its ability to combine with other atoms.
• The valency of an element determines the number of bonds that an atom can make as part of a complex.
• The electrons in the atom's outermost orbit are referred to as valence electrons.

Valency of Calcium carbonate

• The number of valence electrons determines the element's valency.
• ${\mathrm{CaCO}}_3$ is the chemical formula for calcium carbonate.
• Calcium has a valency of $+2$ in the molecule ${\mathrm{CaCO}}_3$ (Calcium Carbonate).
• The outermost shell of the calcium atom possesses two free electrons, which are easily transferred to the carbonate group.