Answer:
The difference between Hydrogen-1 and Hydrogen-2 is the number of neutrons.
Explanation:
Hydrogen-1 and Hydrogen-2 are isotopes of hydrogen.
Isotopes are types of atoms that have the same atomic number but differ in atomic mass.
There are 3 naturally occurring isotopes of hydrogen, Protium ([tex]\rm ^1H_1[/tex]) Deuterium ([tex]\rm ^2H_1[/tex]), and Tritium ([tex]\rm ^3H_1[/tex])
The difference between all isotopes is the number of neutrons in the nucleus of an atom.
Protium has no neutrons, deuterium has 1 and tritium has 3 neutrons.
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