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Mg 2 ion has a d5 configuration with the term symbols 4g 4 d 4f 6s and 4p. Which term has the highest energy
Accepted Answer
The term symbol with the highest energy is 4F. Here's why:
Hund's Rules: These rules help determine the ground state electron configuration and the energy ordering of term symbols.
Spin Multiplicity: Higher spin multiplicity (2S+1) corresponds to higher energy. All the given terms have the same spin multiplicity (4), so this doesn't differentiate them.
Total Orbital Angular Momentum: Higher total orbital angular momentum (L) corresponds to higher energy. The values of L are:
G: L = 4
D: L = 2
F: L = 3
S: L = 0
P: L = 1
Therefore, 4F (L=3) has the highest energy among the listed term symbols.
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