units of isotope abundances?

Isotope abundances are given in percentage mass. Example: how they determine the % of deuterium that occurs naturally is by measuring mass differences as a sample of hydrogen is processed. With further consideration, percent of atoms would make little or no sense or practical value.

an atom is defined by the shape of protons it includes ie H a million He 2 Li 3 besides the undeniable fact that the shape of nuetrons can variety interior of a form of component, making Isotopes as an example isotops of hydrogen are protium 0 neutrons deuterium a million neutrons tritium 2 neutrons all 3 have distinct atomic weights, the atomic weight of hydrogen is an regularly occurring that considers the % abundance. isotopes do not exist using percentage abundance. The % abundance is purely an estimate to how a lot of one isotope exists in nature. isotopes happen using nuclear reactions/decay. those nuclear reactions are very small (contain one or a pair atoms) and happen each of the time. as an example tritium must be formed at the same time as a intense potential cosmic ray frees a neutron and speeds up it. If the quick neutron contacts a nitrogen atom a nuclear reaction takes position generating Carbon-12 and tritium.