Electron Configuration and Aufbau Diagram

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 the Aufbau principle?

Back

A rule stating that electrons occupy the lowest energy orbitals first before filling higher energy levels.

Front

What does Hund's rule state?

Back

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

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 a Lewis dot diagram?

Back

A representation of an atom's valence electrons using dots around the element's symbol.

Front

How many valence electrons does carbon have?

Back

4 valence electrons.

Front

What is the electron configuration for oxygen?

Back

1s² 2s² 2p⁴.

Front

What is the significance of the 3d orbital in electron configuration?

Back

The 3d orbital can hold a maximum of 10 electrons and is filled after the 4s orbital in transition metals.

Front

What is the electron configuration for zinc?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰.

Front

What is the maximum number of electrons that can occupy the p sublevel?

Back

6 electrons.