Possible term symbol(s) of the excited states of Na atom with the electronic configuration [1s²2s²2p⁶3p¹]… · ABC26IN1074
Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Electron Transfer Redox · Exam: CSIR NET DEC 2015 · Marks: 2 · Difficulty: Medium
Possible term symbol(s) of the excited states of Na atom with the electronic configuration $[1s^{2}2s^{2}2p^{6}3p^{1}]$ is/are
(a)$^{2}S_{1/2}$
(b)$^{2}P_{3/2}$ and $^{2}P_{1/2}$
(c)$^{1}S_{0}$ and $^{1}P_{1}$
(d)$^{3}P_{0}$ and $^{3}P_{1}$
Answer
Answer: B ✓ checked by 4AB · confidence high
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
One electron in 3p: L = 1, S = ½ → ²P, with J = 3/2 and 1/2: ²P₃/₂ and ²P₁/₂ (the sodium D-line doublet).