1.

Assertion : The maximum number of electrons in the shell with principle quantum number n is equal to 2n^(2). Reason : Two electrons can have the same value of three quantum numbers n, l and m_(l), but must have the opposite spin quantum number.

Answer»

If both ASSERTION and REASON are TRUE and reason is the CORRECT EXPLANATION of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

Answer :A


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