Question

Match the following according to their similarities with hydrogen.

• A. $n{s}^1$ configuration
• B. Diatom gas formation
• C. $\frac{1}{2}$filled valence shell

Answer 1

Alkali metals have $n{s}^1$ configuration in its valence orbit and the valence orbit configuration of hydrogen is also $1s^1$.

Hydrogen atoms form diatom gas $H_2$. Halogens also form gases of formula $X_2$.

Carbon in its excited state has a half-filled valence orbit ($2s^{1}2p^3$). Also hydrogen has only one electron in its $1s$ orbit, which is half-filled.