What is the number of NEUTRONS in an atom having Z=2, M=5?
a) 0
b) 1
c) 2
d) 3
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A= atomic mass
Z= number of protons= number of electrons
n= number of neutrons
n=A−Z
Example:- Chlorine ⟶
17
35
Cl
n=A−Z
=35−17
=18
(i) Number of protons= Number of electrons= 17
[Neutral atoms has same number of electron and proton]
(ii) Number of neutron= 18.
(don't know exact answer).
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