Question

3. The formula of compounds formed when Na combines with two different
non-metals X and Y are Naz X and Na Y respectively.
a) Determine the valencies of X and Y.
b) Identify the groups in which X and Y would be placed in the Modern
Periodic table.​

Answer 1

if they combine with Na to form NaX and NaY, then valency of X&Y are 1

the group for both is 17