Question

How Can Electron Configurations of All Elements Except Hydrogen and Helium Be Represented?

a) Pauli exclusion principle
b) Aufbau principle
c) Hund's rule
d) Bohr's model

Answer 1

a) Pauli exclusion principle

b) Aufbau principle

c) Hund's rule

The electron configurations of all elements, except hydrogen and helium, can be represented using the principles of the Aufbau Principle, Hund's Rule, and the Pauli Exclusion Principle.

Step-by-step explanation:

The electron configurations of all elements, except hydrogen and helium, can be represented using the principles of the Aufbau Principle, Hund's Rule, and the Pauli Exclusion Principle.

The Aufbau Principle states that electrons occupy the lowest energy orbitals first, starting with the 1s orbital and continuing in order of increasing energy.

Hund's Rule states that when electrons occupy degenerate orbitals, they first singly occupy each orbital before pairing up.

The Pauli Exclusion Principle states that no two electrons can have the same set of quantum numbers, including their spin.