The increasing order (lowest first) for the values of `e//m` (charge//mass) for electron `(e)`, proton `(p)`, neutron `(n)`, and alpha particle `(alpha)` is

Options

A. e,p, n, `alpha`
B. n, p, e, `alpha`
C. n, p, `alpha`, e
D. n, `alpha`, p, e

Answer

D

Explanation

`(e)/(m)` for (i) neutron ` = (0)/(1) = 0`
(ii) `alpha `- particle `= (2)/(4) = 0.5`
(iii) proton `= (1)/(1) =1`
(iv) electron ` = (1)/(1//1837) = 1837`