Isotopes of hydrogen

Protium, the most common isotope of hydrogen, consists of one proton and one electron. Unique among all stable isotopes, it has no neutrons. (see diproton for a discussion of why others do not exist)

A deuterium atom contains one proton, one neutron, and one electron

A tritium atom contains one proton, two neutrons, and one electron

Hydrogen (H) (relative atomic mass: 1.00794) has three naturally occurring isotopes, sometimes denoted H, H, and H. The first two of these are stable while H has a half-life of 12.32 years. All heavier isotopes are synthetic and have a half-life less than one zeptosecond (10 second). Of these, H is the most stable, and H is the least.

单词	Quadrium
释义	Quadrium 英语百科 Isotopes of hydrogen Hydrogen (H) (relative atomic mass: 1.00794) has three naturally occurring isotopes, sometimes denoted H, H, and H. The first two of these are stable while H has a half-life of 12.32 years. All heavier isotopes are synthetic and have a half-life less than one zeptosecond (10 second). Of these, H is the most stable, and H is the least.
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Quadrium

Isotopes of hydrogen