Question

An element has the valency of +3 what will be the formula of its sulphide

Answer 1

Explanation:

Valency:

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

• An element has the valency of +3 what will be the formula of its sulphide is ${\mathrm{M}}_2{\mathrm{S}}_3$.
• The M has a +3 charge so 2M have a +6 charge to balance that need a -6 charge
• Sulfer have a -2 charge therefore we need 3 sulpher atom to balance the equation