Assertion : Two electrons in an atom can have the same values of four quantum numbers. Reason : Two electrons in an atom can be present in the same shell, sub-shell and orbital and have the same spin.

Assertion : Two electrons in an atom can have the same values of four

1.	Assertion : Two electrons in an atom can have the same values of four quantum numbers. Reason : Two electrons in an atom can be present in the same shell, sub-shell and orbital and have the same spin.
Answer» If both ASSERTION and reason are true and the reason is the CORRECT explanation of the assertion If both assertion and reason are true butreason isnot the correct explanation of the assertion If assertion is true but reason is false If the assertion and reason both are false Solution :We know from the Pauli exclusion principle, that two electrons in the same atom can not have same VALUE of all four quantum numbers. This means each electron in an atom has only ONE set of values of n,l,m and s. Therefore both the Assertion and Reason are false.