Question

Which of the following elements belong to noble gases?

• A. $\text{Cl}$
• B. $\text{He}$
• C. $\text{Na}$
• D. $\text{Ca}$

Answer 1

The correct option is B $\text{He}$

Elements with shells that are already full and have no electrons to lend are called noble gases. The six naturally occurring noble gases are helium $\text{(He)}$, neon $\text{(Ne)}$, argon $\text{(Ar)}$, krypton $\text{(Kr)}$, xenon $\text{(Xe)}$, and the radioactive radon $\text{(Rn)}$.