Electron Configuration

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, indicating how electrons are arranged around the nucleus.

Front

What is the Aufbau principle?

Back

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

Front

What is the Pauli Exclusion Principle?

Back

No two electrons in an atom can have the same set of four quantum numbers; thus, an orbital can hold a maximum of two electrons with opposite spins.

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 maximum number of electrons in an orbital?

Back

2 electrons.

Front

What is a noble gas configuration?

Back

A shorthand notation for electron configuration that uses the nearest noble gas to simplify the representation.

Front

Which noble gas is used for shorthand configuration of Argon?

Back

Neon (Ne).

Front

What is the electron configuration for Oxygen?

Back

1s² 2s² 2p⁴.

Front

What is the electron configuration for Magnesium?

Back

1s² 2s² 2p⁶ 3s².

Front

What is the electron configuration for an atom with atomic number 12?

Back

1s² 2s² 2p⁶ 3s².