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In a d5 configuration having the following term symbols: 4g, 4d, 4f, 6s, 4p. What term symbol would be highest in energy

Accepted Answer

The term symbol with the highest energy is 4F. Here's why:

Hund's Rules: These rules help predict the ground state electron configuration and term symbol.
Rule 1: Maximize the total spin multiplicity (S). A higher spin multiplicity corresponds to a higher energy level.
Rule 2: Maximize the total orbital angular momentum (L). Larger L values correspond to higher energy levels.
Rule 3: For a given L and S, the term symbol with the lowest J value is lowest in energy for less than half-filled subshells, and the term symbol with the highest J value is lowest in energy for more than half-filled subshells.
In the given term symbols, the 4F term symbol has the highest L value (L=3), indicating the highest energy level.


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