Question

Which is the second-lightest element?

• A. Helium
• B. Hydrogen
• C. Lithium
• D. Nitrogen

Answer 1

The correct option is A

Helium

Explanation for the correct option:

(A) Helium:

• It is a monoatomic element.
• Helium is considered to be the second lightest element after hydrogen.
• It is an inert gas.
• Helium is a colourless, odourless, and tasteless gas

Explanation for the incorrect option:

(B) Hydrogen is the first lightest element.

(C) Lithium is heavier than helium.

(D) Nitrogen is heavier than helium.

Hence, option (A) i.e, helium is the second lightest element.