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Get Answers to all your Questions
Q. 2. Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Answers (1)
The atomic mass of helium = 4 u
No. of protons = 2
As atomic mass = no. of protons + no. of neutrons
No. of neutrons = At. mass - no. of protons
= 4 - 2
= 2
Hence, the helium atom has 2 neutrons.
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