The mass number of fe2+ is 56. how many neutrons are there in a single fe2+ atom?
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Ответ:
the number of neutrons present in a single
atom is 30
Explanation: Given atom is
which is basically ion of iron from which two electrons have been removed .
Thus Atomic number of
, Z = 26
Mass number of
, M=56
Now we know that the mass number of the atom (M) is equal to the sum of the number of protons(P) and neutrons(N) in the nucleus ,i.e., M=P+N ----(A)
Also the number of protons in the nucleus of the atom is equal to the atomic number (Z).
Therefore number of protons , P=Z= 26
Using equation (A) we get
56=26+ N
=>N=30
Thus the number of neutrons present in a single
atom is 30
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