Which of the following elements is a noble gas?

Explanation

Helium belongs to the noble gas family found in Group 18 of the periodic table. Noble gases have completely filled outer electron shells, making them chemically inert.

Helium has two electrons that completely fill its first and only electron shell. This full outer shell means helium does not need to bond with other atoms.

Other noble gases include neon, argon, krypton, xenon, and radon. All noble gases exist as single atoms and rarely form chemical compounds.