Question

From the symbol ${}_{20}{}^{40}\mathrm{Ca}$ state:

Electronic distribution of Ca.

Answer 1

Ca:

1. Ca symbol is used for Calcium.
2. Calcium is a metal and it belongs to s-block.

General representation of an element: ${}_{\mathrm{Z}}{}^{\mathrm{A}}\mathrm{X}$

Here,

A = mass number of element X

Z= atomic number or number of protons in X

So,

$$\begin{gathered} \mathrm{Atomic}\mathrm{number}\mathrm{of}{}_{20}{}^{40}\mathrm{Ca}\mathrm{will}\mathrm{be}20. \\ \mathrm{Therefore},\mathrm{No}\mathrm{of}\mathrm{electrons}=20 \\ \mathbf{Hence}\mathbf{,}\mathbf{}\mathbf{electronic}\mathbf{}\mathbf{distribution}\mathbf{}\mathbf{of}\mathbf{}{}_{\mathbf{20}}{}^{\mathbf{40}}\mathbf{Ca}\mathbf{}\mathbf{is}\mathit{2}\mathit{,}\mathit{8}\mathit{,}\mathit{8}\mathit{,}\mathit{2}. \end{gathered}$$