Question

Write the name, symbol and electronic configuration of an element $\mathrm{X}$ whose atomic number is $11$.

Answer 1

Element $\mathrm{X}$:

• The atomic number is given as $11$.

• We know that the atomic number of sodium is $11$.
• So, the element $\mathrm{X}$ is sodium
• The symbol of sodium is $\mathrm{Na}$ .
• It is an alkali metal.

Electronic configuration

• The electronic configuration of $\mathrm{Na}$ is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^1$.