A helium-4 nucleus is a type of atomic nucleus made up of two protons and two neutrons. It is stable and commonly found in helium gas.
Topic 7.3: 7.3 Energy in Modern Physics
Helium-4 nucleus cheat sheet for homework
A particle consisting of two protons and two neutrons, identical to a helium-4 nucleus.
The process where atomic nuclei combine to form heavier nuclei, releasing energy.
The spontaneous breakdown or disintegration of atomic nuclei over time.