Question

Decay of hydrogen nucleus?

Answer 1

The most abundant isotope, hydrogen-1, protium, or light hydrogen, contains no neutrons and is simply a proton and an electron. Protium is stable and makes up 99.985% of naturally occurring hydrogenatoms. ... Tritium contains two neutrons and one proton and is not stable, decayingwith a half-life of 12.32 years.

Answer 2

Hydrogen-4. H (atomic mass is4.02643(11) u) contains one protonand three neutrons in its nucleus. It is a highly unstable isotope of hydrogen. It has been synthesised in the laboratory by bombarding tritium with fast-moving deuterium nuclei.