JEE Main 2012 Chemistry question
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
Answer: (2)
Solution
(n + l) rule: (iv) 3p = 4, (ii) 4s = 4 (higher n), (iii) 3d = 5, (i) 4p = 5
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