Question

pleaee tell the ansety​

Answer 1

Question :

The formula of a compound is X₃Y. The valencies of elements X and Y will be respectively :

a) 1 and 3

b) 3 and 1

c) 2 and 3

d) 3 and 2

Answer :

a) 1 and 3

Because when we will write it in cris cross form then we will write the valency of X is 1 and valency of Y is 3.

_______________________________

More details :

❆ Valency : The number of electrons lost,gained or shared in a chemical reaction is known as valency.

❆ Valence electron : The number of electrons present on the last shell is know as valence electron.

❆ How to find valency :

• If the last shell contains 1,2,3,4 electrons then the valency will be same.

• If the last shell contains 5,6,7,8 electrons then we will subtract the valency by 8.