Question

what is the number of 3He​

Answer 1

Answer:

Helium-3 (3He, tralphium,[1][2] see also helion) is a light, stable isotope of helium with two protons and one neutron (the most common isotope, helium-4, having two protons and two neutrons in contrast). Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons. Helium-3 was discovered in 1939.

Explanation:

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Answer 2

Explanation:

the helium 3 atom is stable isotope with relative atomic mass 3.016029