The following sets of quantum numbers represent four electrons in an atom. (i) n = 4 , l = 1 (ii) n = 4 , l = 0 (iii) n = 3 , l = 2 (iv) n = 3 , l = 1 The sequence representing increasing order of ene

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The following sets of quantum numbers represent four electrons in an atom. (i) n = 4 , l = 1 (ii) n = 4 , l = 0 (iii) n = 3 , l = 2 (iv) n = 3 , l = 1 The sequence representing increasing order of energy, is

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(i) 4 p (ii) 4 s (iii) 3 d (iv) 3 p According to Bohr Bury's ( n + ℓ ) rule, increasing order of energy will be (iv) < (ii) < (iii) < (i). Note: If the two orbitals have same value of ( n + ℓ ) then the orbital with lower value of n will be filled first.

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