Question

an element X forms and oxide x2o5 .. a) what is the valency of element x and o .....
b) what will be formula of chloride of x .....
c) what is the atomicity of molecule x2o5

Answer 1

a) Valency of element x is 5 and Valency of element o is 2

b) Formula of chloride of x will be

2XCl

c) atomicity is no. of atoms

So, atomicity of x2o5 is 7

Answer 2

a) x has a valency of 3.
o has a valency of 2.
compound is p2o5(phosphorous pentoxide).

b) xcl5
(phosphorus pentchloride)

c) the atomicity is 7.