Question

The increasing order of the values of e/m (charge/ mass) is :

• A. e, p, n, α
• B. n, p, e, α
• C. n, p, α, e
• D. n, α, p, e

Answer 1

The correct option is

A

n, α, p, e

Lets assume that each particles are one mole each and the charge we are talking about is - F(faraday) per mole of electrons.

Particle	charge(e)	Mass(m)	e/m
n	0F	$m_p+n_p$	0
e	1F	$\frac{1}{1850}$	1850
p	1F	$\approx 1g$	$\approx 1$
alpha	2F	4 gram	$0.5$