Question

Which of the following family exist as diatomic molecules at room temperature?

• A. Alkali metals
• B. Alkaline earth metals
• C. Noble gases
• D. Halogens
• E. Transition metals

Answer 1

The correct option is D Halogens

Halogens exist as diatomic molecules at room temperature. The valence shell electronic configuration of halogens is $n{s}^{2}n{p}^5$. Two halogen atoms share one electron each to form diatomic molecule in which each halogen atom has completed its octet.