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How many electrons in an atom may have the following quantum numbers?
Assertion: Electronic configuration of helium is 1S². Reason: Hund's rule demands that the configuration should display maximum stability.
Assertion: An orbital cannot have more than 2 electrons and their spin must be opposite. Reason: No two electrons in an atom can have same set of all four quantum numbers.
The correct order of increasing energy of atomic orbital is:
Out of 3d and 4s orbitals which is filled first?
How many electrons can be filled in all the orbitals with n+l=5?
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