Question

Assertion: Group 18 elements do not combine with any other elements.
Reason: All the elements of group 18 have a stable configuration.

• A. Both assertion and reason are true and the reason is the correct explanation of assertion.
• B. Both assertion and reason are true but the reason is not the correct explanation of assertion.
• C. The assertion is true but the reason is false.
• D. Both assertion and reason are false.

Answer 1

The correct option is A Both assertion and reason are true and the reason is the correct explanation of assertion.

The members of the group have eight electrons in their valence shell (except helium which has two electrons). Their electronic configuration is considered to be stable, since they are chemically unreactive, which means they don't combine with other elements to form compounds. The elements are also known as inert gases.