The electrons identified by quantum number n and l - Infinity Learn by Sri Chaitanya

A
$n = 4, l = 1$
B
$n = 4, l = 0$
C
$n = 3, l = 2$
D
$n = 3, l = 1$

Solution:

Energy of an electron in an atom increases with increase in the value of $n + l .$ For the same value of $n + l .$ The energy is larger for the larger value of n. Hence, we have

Choice (i); $n + l = 4 + 1 = 5$ Choice (iii); $n + l = 3 + 2 = 5$

Choice (ii); $n + l = 4 + 0 = 4$ Choice (iv); $n + l = 3 + 1 = 4$

Hence, the correct order of increasing energy is (iv) < (ii) < (iii) < (i)

Solution:

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