Question

What are the names and symbols of elements having electronic configuration?

$$\begin{gathered} \mathrm{K}\mathrm{L}\mathrm{M}\mathrm{N} \\ 23 \end{gathered}$$

Answer 1

1. The element having an electronic configuration $$\begin{gathered} \mathrm{K}\mathrm{L}\mathrm{M}\mathrm{N} \\ 23 \end{gathered}$$ is Boron (B).

2. There are $5\mathrm{electrons}$present in $\mathrm{Boron}\left(\mathrm{B}\right)$, two electrons in the K shell and three electrons in the L shell.

3. As the atomic number of Boron is $5$,

$\mathrm{Number}\mathrm{electrons}\mathrm{present}=\mathrm{Number}\mathrm{of}\mathrm{protons}=\mathrm{Atomic}\mathrm{Number}.$

4. Therefore, the number of electrons present = $5$

Thus, Boron ($\mathrm{B}$) have $5\mathrm{electrons}$, and has the electronic configuration $$\begin{gathered} \mathrm{K}\mathrm{L}\mathrm{M}\mathrm{N} \\ 23 \end{gathered}$$.