Question

The group number, number of valence electrons, and valency of an element with the atomic number $15$, respectively, of $P$, are:

• A. $16,5$ and $2$
• B. $16,6$ and $3$
• C. $15,5$ and $3$
• D. $15,6$ and $2$

Answer 1

The correct option is C $15,5$ and $3$

Atomic number $\left(Z\right)=15=P\to \left[Ne\right]3s^{2}3p^3$

Phosphorus belongs to the $15th$ group.

Number of valence electrons $3s^{2}3p^3=5$

and valency $=3$ in general.

Hence, the correct option is $C$