Question

Give a reason for the following:

Sulphur exhibits negative valency.

Answer 1

Valency- It is the combining capacity of an element with other element by gaining , losing or sharing of electron to attain octet in outer most shell.

Way to find valency of an element-

1. To write electronic configuration.
2. No. of electron in outermost shell.
3. No. of electron required to complete outermost shell.

Valency of Sulphur (S)

1. Electronic configuration- 2,8,6
2. No. of electrons in outermost shell- 6
3. No. of electron required to complete outer most shell- if 2 electron is gain by Sulphur then its octet will be complete.

Hence, Valency of Sulphur- 2

Conclusion:

• As Sulphur will gain two more electrons, and number of electrons is more than protons.
• It has negative valency.