Tritium has two neutrons and one proton: the mass is 3 amu.
Tritium, or Hydrogen 3, has an atomic mass of 3.016.
The mass number of Tritium is 3, however actual mass is 3.017005 AMU.
m=0.009106u
Tritium, an isotope of hydrogen, or Helium-3 (which does not have a specific name).
0.000019 AMU
4.472 g/cm-3 as a solid 4.24 g/cm-3 as a liquid
The atomic mass (that's the proper term) of deuterium (you spelled it incorrectly) is less than that of tritium.
deuterium is 2 , tritium is 3. I have never heard of deutritium.
These are the Hydrogen isotopes with the least mass: Hydrogen 1-protium Hydrogen 2-deuterium Hydrogen 3-tritium
1.6749x10-24
1 proton 1 electron 2 neutrons mass = 3 amu
If you think to tritium (hydrogen-3) the mass number is 3.If you think to helium-4 the mass number is 4.