Electron Configuration

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 is Hund's Rule?

Back

Electrons will fill degenerate orbitals singly before pairing up, to minimize electron-electron repulsion.

Front

What is the Aufbau Principle?

Back

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

Front

What is the maximum number of electrons that can occupy the first energy level?

Back

2 electrons.

Front

What is the electron configuration of an oxygen atom?

Back

1s² 2s² 2p⁴.

Front

What is the electron configuration of magnesium?

Back

1s² 2s² 2p⁶ 3s².

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 the maximum number of electrons that can occupy the second energy level?

Back

8 electrons.

Front

What is an ion?

Back

An atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What is the charge of a magnesium ion (Mg²⁺)?

Back

It has a charge of +2, indicating it has lost two electrons.