MCQ
The element which has the maximum number of valence electrons is :
- A$\ce{Na}.$
- ✓$\ce{P}.$
- C$\ce{Si}.$
- D$\ce{Al}.$
✓
Answer
Correct option: B.
$\ce{P}.$
Phosphorus $(P)$ has the maximum number of valence electrons, equal to $5.$
Electronic configuration of $P (15):$
$\begin{matrix}\text{K}\ \ \text{L}\ \ \text{M}\\2\ \ \ 8\ \ \ 5\end{matrix}$
Sodium $\ce{(Na)}$ has $1,$ Silicon has $4$ and Aluminium $\ce{(Al)}$ has $3.$
Electronic configuration of $P (15):$
$\begin{matrix}\text{K}\ \ \text{L}\ \ \text{M}\\2\ \ \ 8\ \ \ 5\end{matrix}$
Sodium $\ce{(Na)}$ has $1,$ Silicon has $4$ and Aluminium $\ce{(Al)}$ has $3.$
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