Question

The quesiton consistes of two statement. Assertion (A) and Reason (R).
Answer this question selecting the correct option given below:
Assertion (A)- The number of electrons in the valence shell of helium atom is 2.
Reason (R)- The valency of helium is 2.
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but Ris not correct explanation of A c. A is true and R is false . d.A is false and R is true​

Answer 1

Explanation:

Correct option is

A

True

Helium atom with electronic configuration 1s

2

has two valence electrons but since it is a noble gas, it does not form a chemical bond, its duplet is complete.Therefore, valency is zero.

Answer 2

Answer:

both a n r are true and r is the correct for