Electron Configuration Basics

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, indicating the energy levels and sublevels occupied by electrons.

Front

What does the Aufbau Principle state?

Back

Electrons occupy the lowest energy orbitals first before filling higher energy orbitals.

Front

What is the maximum number of electrons that can be held in the second shell of an atom?

Back

8 electrons.

Front

What is the significance of the Pauli Exclusion Principle?

Back

No two electrons in an atom can have the same set of four quantum numbers.

Front

What is Hund's Rule?

Back

Electrons will fill degenerate orbitals (orbitals of the same energy) singly before pairing up.

Front

What is the electron configuration for Magnesium (Mg)?

Back

1s² 2s² 2p⁶ 3s².

Front

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?

Back

Chlorine (Cl).

Front

What is the electron configuration for Chlorine (Cl)?

Back

1s² 2s² 2p⁶ 3s² 3p⁵.

Front

What is the electron configuration for Neon (Ne)?

Back

1s² 2s² 2p⁶.

Front

What is the electron configuration for Argon (Ar)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶.