Question

e/m order of particles

Answer 1

the ans is It has +2 charge and the mass of four protons. So the alpha particle has the least E/M because of its large mass.You can see that its E/M is equal to 1/2 time E/M of a proton. Neutron has no charge. Then its E/M is 0.
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Answer 2

sorry for the camera quality... but ur answer is there....
order : electron > proton > neutron
Any doubts regarding, ask me in the comments.

HOPE THIS HELPS :)