Why is triplet excited state lower in energy than singlet?
Energy of Excited States:
When an electron in a molecule is excited to a higher energy orbital, there are two possible excited states possible. One is a singlet state where the electron's spin is opposite that of its original spin, and the other one is a triplet state where the electron retains the same spin as it started.
Answer and Explanation:
The primary reason for a triplet excited state being lower energy than a singlet excited state is related to Hund's Rule for filling degenerate atomic...
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from General Studies Science: Help & ReviewChapter 1 / Lesson 5