Question

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

• A. e, p, n, $\alpha$
• B. n, p, e, $\alpha$
• C. n, p, $\alpha$, e
• D. n, $\alpha$, p, e

Answer 1

The correct option is D n, $\alpha$, p, e

Charge/mass for $n=0,\alpha =\frac{2}{4},p=\frac{1}{1},e=\frac{1}{1/1837}$
So, order is n, $\alpha$, p, e.