Question

An element $X$ belongs to $3^{rd}$ period and group $16$ of the Modern Periodic Table.
Determine the number of valence electrons and the valency of X?

Answer 1

Number of valence electrons for the element in group 16 and period $3$ is $6$.

The maximum capacity of M shell as valence shell is $8$.

Hence, valency of element X is $2$ $(8-6=2)$ and number of valency electrons is $6$.