Question

Which is a non-metal in the following?

• A. Cr
• B. \( \text{Fe}^{2+} \)
• C. He
• D. Hg

Hint:

Noble gases like Helium (\( He \)) are non-metals and are chemically inert.

Answer 1

The Correct Option is C

Helium (\( He \)) is a noble gas and a non-metal. It is chemically inert and does not form compounds under normal conditions. Other options—Chromium (\( Cr \)), Iron ion (\( Fe^{2+} \)), and Mercury (\( Hg \))—are metals.