Increasing order (lowest first) for the values of e\/m (charge \/ mass) for electron (e), proton (p), neutron (n) and α -particle (α)isn,α,p,e e∕m for neutron =
0
1
=0 e∕m for alpha particle =
2
4
=0.5 e ∕m for proton =
1
1
=1 e∕m for electron =
1
(
1
1850
)
=1850 Note: e is the charge of the particle, m is the mass of a particle and the mass of an electron is