helium atom has an atomic mass of 4u and two protons in its nucleus.How many neutrons does it have?
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Answered by
1
Answer:
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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Answered by
4
Answer:
2 neutrons
Explanation:
Mass no. = no. of protons + no. of neutrons
4u = 2 + no. of neutrons
no. of neutrons = 4 - 2
= 2
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