MCQ
Which of the following electronic configurations in the outermost shell is characteristic of alkali metals
- A$(n - 1)\,{s^2}{p^6},\,n{s^2}{p^1}$
- B$(n - 1)\,{s^2}{p^6}{d^{10}},\,n{s^1}$
- ✓$(n - 1)\,{s^2}{p^6},\,n{s^1}$
- D$n{s^2}{p^6}{d^1}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Assertion $A$ : Zero orbital overlap is an out of phase overlap.
Reason $R$ : It results due to different orientation/ direction of approach of orbitals.
In the light of the above statements. Choose the correct answer from the options given below.
Statement $I$ : The metallic radius of $\mathrm{Na}$ is $1.86 \mathrm{~A}^{\circ}$ and the ionic radius of $\mathrm{Na}^{+}$is lesser than $1.86 \mathrm{~A}^{\circ}$.
Statement $II$ : Ions are always smaller in size than the corresponding elements.
In the light of the above statements, choose the correct answer from the options given below :