Question

Using the periodic table ,predict the formula of compound formed between an element "x" of group 13 and another element "y" of group 16

Answer 1

‘X’ is in group 13
=> x has a valency 3
‘Y’ is in group 16
=> y has a valency of 2
X. Y.
3. 2

=> compound is X2Y3

Answer 2

Answer:

The formula of the compound is X₂Y₃

Explanation:

• Valency of group 13 element = 3

• Valency of group 16 element = 2

• We can use the valencies of an element to find how many atoms of an element will react with atoms of another element to form a compound.
• Here, then after finding valencies, cross multiplication is done such as Y is multiplied by 3 and X by 2 so, the formula comes out to be X₂Y₃ .