Isotopes are atoms of the same element that have the same number of protons and electrons but a different number of neutrons. Some common isotopes in fusion are:
# Protium is a hydrogen isotope with one proton and no neutrons. It is the most common form of hydrogen and the most common element in the universe.# Deuterium is a hydrogen isotope with one proton and one neutron. It is not radioactive and can be extracted from seawater.# Tritium is a hydrogen isotope with one proton and two neutrons. It is radioactive, with a half-life of about 10 years. Tritium does not occur naturally but can be made by bombarding lithium with neutrons.# Helium-3 is a helium isotope with two protons and one neutron.# Helium-4 is the most common, naturally occurring form of helium, with two protons and two neutrons.
# Protium is a hydrogen isotope with one proton and no neutrons. It is the most common form of hydrogen and the most common element in the universe.# Deuterium is a hydrogen isotope with one proton and one neutron. It is not radioactive and can be extracted from seawater.# Tritium is a hydrogen isotope with one proton and two neutrons. It is radioactive, with a half-life of about 10 years. Tritium does not occur naturally but can be made by bombarding lithium with neutrons.# Helium-3 is a helium isotope with two protons and one neutron.# Helium-4 is the most common, naturally occurring form of helium, with two protons and two neutrons.
