English Wikipedia - The Free Encycl...
Download this dictionary
Hydrogen atom
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 elemental
(
baryonic
) mass of the universe.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License