Question

1. choose the best answer. which rule states that orbitals of equal energy are occupied by a single electron before any orbital is occupied by a second electron? aufbau principle, car seat rule, hunds rule, pauli exclusion principle. 4) choose the best answer. which rule states that no two electrons in the same atom can have the exact same set of quantum numbers? hunds rule, aufbau principle, pauli exclusion principle, box seat rule

Explanation:

For question 3: This describes the rule governing electron filling in degenerate (equal energy) orbitals, where single electrons occupy each orbital first.
For question 4: This describes the rule that prevents two electrons in an atom from having identical quantum numbers.

Answer:

1. B. Hund's rule
2. B. Pauli exclusion principle