Hydrogen atom
From Wikipedia, the free encyclopedia
This article is about the physics of the hydrogen atom. For a chemical description, see hydrogen.
Hydrogen atom
Hydrogen 1.svg
Hydrogen atom
Complete table of nuclides
General
Name, symbol protium, 1H
Neutrons 0
Protons 1
Nuclide data
Natural abundance 99.985%
Isotope mass 1.007825 u
Spin
1
/
2
Excess energy 7288.969± 0.001 keV
Binding energy 0.000± 0.0000 keV
Depiction of a hydrogen atom showing the diameter as about twice the Bohr model radius. (Image not to scale)
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe.[1]