(A) .^(20)Ne and .^(22)Ne are isotones. (R) Noble gases do not exist as isotopes as they are not reactive.

(A) .^(20)Ne and .^(22)Ne are isotones. (R) Noble gases do not exist

1.	(A) .^(20)Ne and .^(22)Ne are isotones. (R) Noble gases do not exist as isotopes as they are not reactive.
Answer» Both (R) and (A) are true and reason is the CORRECT EXPLANATION of assertion. Both (R) and (A) are true but reason is not correct explanation of assertion Assertion (A) is true but reason (R) is false Assertion (A) and reason (R) both are false Answer :D