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    Question ID:   17121         Current Version: 1
Question: Why is a hydrogen proton considered an isotope?
Category: Science > Chemistry
Keywords: hydrogen proton, considered, isotope, deuterium, tritium
Type: why
Rating:(0 ratings)    Views: 149    Discussions: 0   In Watch Lists: 1  

 
    Answer:

Strictly speaking an isotope is one of two or more atoms that have the same atomic number but different mass numbers. The element hydrogen has three isotopes known respectively as hydrogen, deuterium, and tritium. Hydrogen has one proton in its nucleus, deuterium has a proton and one neutron, and tritium has one proton and two neutrons. Each has one electron to balance the charge of the single proton, but differ in mass due to the different number of neutrons in the nucleus. Very little deuterium and tritium occur in nature (approx. 1/100 of a percent or less).

Source: Argonne National Laboratory

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