Question

The ground state term symbol for an electronic state is governed by

• A. Heisenberg principle
• B. Hund's rule
• C. Aufbau principle
• D. Pauli exclusion principle

Hint:

Hund's rule is used to find the most stable electronic configuration and term symbol.

Answer 1

The Correct Option is B

Step 1: Underlying Concept:
Term symbols describe the overall angular momentum of an atom. Ground state term is determined by Hund's rules.
Step 2: Explanation:
Hund's rule: (1) Maximum multiplicity (maximum total spin S); (2) Maximum total orbital angular momentum L for that S; (3) For less than half-filled, J = |L-S|; for more than half-filled, J = L+S. This gives the ground state term symbol.
Step 3: Conclusion:
Hund's rule