Helium atom has an atomic mass of 4u and two protons in its nucleus. H – InterviewSolution

InterviewSolution

1.	Helium atom has an atomic mass of 4u and two protons in its nucleus. How many neutrons does it have ?
Answer» Solution :Mass NUMBER of helium is EQUAL to its atomic mass but has no units Mass numbr (a) ofhelium =4 No of protons in TE nucleus =2 Atomic numer (z) of the ELEMENT =2 No of neutrons (n) = A = -4 - 2 = 2

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