Question

Write the chemical formula for Phosphorus Sulphide using criss-cross method with explanation?
(Valency of P=3 and Valency of S=2,
shouldn't it be P2S3 ?)

Answer 1

valency of phosphorus will be taken 5 not 3 in this case.
formula: P S
valency: 5 2

after criss cross the formula obtained will be P2S5.

hope it helps ☺