Question

Helium, a noble gas has eight electrons in its valence shell.

• A. True
• B. False

Answer 1

The correct option is B False

Noble gas:

• It has been found that, if an element has eight electrons in its valence shell, it becomes chemically inactive. Such elements are called noble gases or rare gases.
• The electronic configuration of noble gas(for neon) is (2,8) exception is Helium, its electronic configuration is 2.
• Examples: Neon, argon, krypton, xenon, and radon have eight electrons in their valence shells and hence, are noble gases.

Exception: Helium has only 2 electrons in K-shell and is a noble gas.

Therefore, the given statement is false.