Question

An element X with atomic number 12 forms a compound with element Y with atomic number 17. The formula of the compound formed is
A) XY
B) XY2
C) X2Y
D) X2Y2​

Answer 1

Answer:

B) XY2

Explanation:

valency of X is 2 and that of Y is 1

so when we crisscross their Valencies

we get XY2

Answer 2

Explanation:

An element X with atomic number 12 forms a compound with element Y with atomic number 17. The formula of the compound formed