Question Detail

CHM 101 Atomic Structure and Quantum Theory Objective Question

Question

What does Hund's rule state?
Options
A Orbitals are filled in order of increasing energy
B In a set of degenerate orbitals, electrons may not be spin-paired in an orbital until each orbital in the set contains one electron
Correct Answer
C No two electrons can have the same four quantum numbers
D Electrons always pair up immediately
Correct Answer

Option B is the correct answer.

Detailed Explanation

Hund's rule states that in a set of degenerate orbitals, electrons may not be spin-paired in an orbital until each orbital in the set contains one electron.

Hint

The notes provide this rule about electron placement in degenerate orbitals.

Question Info