Question

Valency of Calcium is?​

Answer 1

Explanation:

• As valency refers to the number of electrons which an atom can gain,loose or share in order to get stability Ca has a valency of 2 but an oxidation number(apparent charge written on an ion) of 2+ people often confuse the two concepts. Valency on tells you how many electrons an atom can gain,loose or share so no charge will be mentioned but oxidation state has a charge telling you either it has lost or gained an electron.

Answer 2

Answer:

As valency refers to the number of electrons which an atom can gain,loose or share in order to get stability Ca has a valency of 2 but an oxidation number(apparent charge written on an ion) of 2+ people often confuse the two concepts. Valency on tells you how many electrons an atom can gain,loose or share so no charge will be mentioned but oxidation state has a charge telling you either it has lost or gained an electron.

To add on there are 2 ways for an atom to get stable either the duplet rule which states that an atom can gain stability if it completes 2 electrons in valence shell or the octect rule which states that an atom can gain stability if it completes 8 electrons in valence shell. In case of Ca octet rule is applied.