Question

Element X is a metal with valence 2.
Element Y is a non metal with a valence 3.
if Y is a diatonic gas , write the equation for the direct combination of X and Y to form a compound.

Answer 1

X + Y2 ---> X3Y2

Hope this answer helps you. I wrote Y2 because Y is a diatomic gas......for eg, oxygen is a diatomic gas, so we write it as O2