What is the cause of nonmetallic character of elements?

Rearrange the columns $2$ and $3$ to match with the column $1$.

Choose the correct option and rewrite the statement.

The molecular formula of the chloride of an element $\mathrm{X}$ is $\mathrm{XCl}$. This compound is a solid having a high melting point. Which of the following elements be present in the same group as $\mathrm{X}$.

(i) $\mathrm{Na}$ (ii) $\mathrm{Mg}$  (iii) $\mathrm{Al}$ (iv) $\mathrm{Si}$

Choose the correct option and rewrite the statement.

In which block of the modern periodic table are the nonmetals found?

(i) $\mathrm{s}$-block   (ii) $\mathrm{p}$-block   (iii) $\mathrm{d}$-block   (iv) $\mathrm{f}$-bock

An element has its electron configuration as $2,8,2$. Now answer the following question.

What is the atomic number of this element?