The number of orbitals in the fourth energy level is :

4

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16

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32

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9

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Solution

The correct option is C $16$
No. of orbitals is given by $n^{2}$ . So,for value $n = 4$ in the number of orbitals formula it is $4 \times 4 = 16$

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List-I	List-II
(A) The number of sub-energy levels in an energy level	(1) $n^{2}$
(B) The number of orbitals in a sub-energy level	(2) $3 d$
(C) The number of orbitals in an energy level	(3) $2 l + 1$
(D) $n = 3, l = 2, m = 0$	(4) $n$

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