A) Electron
B) Proton
C) Neutron
D) \[\alpha -\]particle
Correct Answer: C
Solution :
(a) Electron revolves around the nucleus of an atom in different atoms. It is a stable particle. (b) Proton has positive charge and its mass is 1836 times the electronic mass. In free state, the proton is a stable particle. (c) Neutron carries no charge. Its mass is 1839 times the electric mass\[(1.675\times {{10}^{-27}}kg)\]. In free state the neutron is unstable (its mean life is about 17 min), but it constitutes a stable nucleus along with proton. (d) \[\alpha -\]particle is a helium nucleus whose atomic number is 2 and mass number is 4. Hence, out of the given four options neutron is most unstable.
You need to login to perform this action.
You will be redirected in
3 sec
