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Question

After np obitals are filled, the next orbital to be filled will be

A
(n + 1)s
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B
(n+2)p
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C
(n+1)d
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D
(n+2)s
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Solution

The correct option is A (n + 1)s
After the np orbitals, the next orbital to be filled is (n+1)s, since energetically it is the next higher orbital.

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