Question

Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.

Answer 1

(a) Y + 3e^-→ Y^3-

(b) 3X +Y₂ → X₃Y₂