Question

An atom of an element has electronic configuration $2,3$. It forms a compound with an element having the electronic configuration $2,7$. Identify the false statement regarding the compound.

• A. It possesses contracted octet.
• B. It can act as an electron acceptor.
• C. There are three lone pairs on a non-metal atom.
• D. It is an unstable molecule.

Answer 1

The correct option is A

It possesses contracted octet.

Explanation for the correct option:

• The element having electronic configuration of $2,3$ is Boron $\left(B\right)$.
• The element having electronic configuration of $2,7$ is Fluorine $\left(F\right)$.
• The compound that will be formed When Boron is going to react with Fluorine is Boron trifluoride (${\mathrm{BF}}_3$).
• This is a stable compound.
• Boron in ${\mathrm{BF}}_3$ has six electrons around it so it possesses a contacted octet.
• It has a vacant p-orbital due to which it can accept electrons.
• There are three lone pairs present on each of the non-metal atoms.

Hence, the correct option is (A).