chemistry
posted by andrea .
wen determining the formula for a compound its important to no the valance no of each element suppose element a has a valance no of 3 an element b has a valence no of 2 if the two elements combine then wen writing the formula for the resulting compound wat subscript no will be give to element b 1 2 3 or 5

The formula will be A2B3, where A and B represent to two elements. B will have subscript 3.