AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/463-ground-state
Expert Written
|
Fact Checked
|
Sources Cited
|
AllChemicals Editorial Team
Quick Reference
Also Known As
Ground level, ground configuration, lowest energy state, normal state
What is Ground State?
The lowest energy state of an atom, ion, or molecule in which all electrons occupy the lowest available energy levels. Ground state configurations follow the Aufbau principle, Hund's rule, and Pauli exclusion principle. Atoms in the ground state require energy input to become excited.
Properties & Characteristics
The ground state is the lowest energy quantum state of an atom, molecule, or nucleus. Electrons in the ground state occupy the lowest available orbitals according to the Aufbau principle, obeying the Pauli exclusion principle and Hund's rule. Atoms in the ground state are the most stable configuration. Any higher energy state is an excited state. All spectroscopic transitions begin or end at the ground state.
Uses & Applications
Ground state electron configurations are the foundation of all spectroscopic analysis: transitions from ground to excited state (absorption), and excited back to ground (emission). Ground state geometries are used in quantum chemical calculations, molecular modelling, and drug-receptor docking studies.
Safety Information
No direct safety concern for the concept. Systems in ground states are generally more stable and less reactive than excited state species. Excited states (generated by UV irradiation) of otherwise stable molecules can cause hazardous photochemical reactions.
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
SynonymsGround level, ground configuration, lowest energy state, normal state
Frequently Asked Questions
The lowest energy state of an atom, ion, or molecule in which all electrons occupy the lowest available energy levels. Ground state configurations follow the Aufbau principle, Hund's rule, and Pauli exclusion principle. Atoms in the ground state require energy input to become excited.
Ground state electron configurations are the foundation of all spectroscopic analysis: transitions from ground to excited state (absorption), and excited back to ground (emission). Ground state geometries are used in quantum chemical calculations, molecular modelling, and drug-receptor docking studi…
No direct safety concern for the concept. Systems in ground states are generally more stable and less reactive than excited state species. Excited states (generated by UV irradiation) of otherwise stable molecules can cause hazardous photochemical reactions.
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.
