Helium atom atom has an atomic mass of 4 unit and two protons in the nucleus how many neutrons does it have??
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6
Explanation:
→2 neutrons
The mass of an atom is given by the sum of the masses of protons and neutrons present in the nucleus. Since helium atom has a atomic mass of 4 u and it has two protons. Two protons contribute 2 u to atomic mass. Hence, it must contain 2 neutrons.
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3
Explanation:
:- 2 neutrons
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