Question

Expanded octet can be observed in the valency shell of the central atom in:

• A. $N{H}_3$
• B. $C{H}_4$
• C. $PC{l}_5$
• D. $BeC{l}_2$

Answer 1

The correct option is C $PC{l}_5$

In $PC{l}_5$, in atomic state $P$ has $5$ valence electrons. On sharing $5$ electrons with $5Cl$ atoms, $P$ has total $10$ electrons in it's valence shell. As $P$ has more than $8$ electrons in valence shell, it is called as super octet or extended octet.