WAEC - Chemistry (2013 - No. 3)
The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is
M2Y3
M3Y2
MY
M3Y
Explicació
M is a trivalent metal i.e M = 3+ ; Y is a divalent non-metal i.e Y = 2-
A reaction between M and Y will yield M\(_2\)Y\(_3\).