Question

the charge to mass ratio of alpha particle is approximately two the charge to mass ratio of proton is​

Answer 1

Explanation:

Alpha particle is a helium nucleus that comprises two protons and two neutrons, and the charge is twice the charge of the proton while the mass is around four times greater. Mass of helium = 4m. Therefore, the charge to mass ratio of an alpha particle is approximate twice the charge to mass ratio of a proton.

Answer 2

Answer:

Alpha particle is a helium nucleus containing two protons and two neutrons so its charge is twice the proton’s charge while the mass is about 4 times greater.

Let the charge of the proton be +e, then the charge of the alpha particle will be +2e. Similarly mass of the proton be m, then the mass of the alpha particle will be 4m.

Specific charge = charge/mass of the substance.

For proton, specific charge =

$\frac{m}{e}$

For alpha particle, specific charge =

$\frac{2e}{4m}$

Therefore the ratio is =

$\frac{m}{e} \times \frac{2e}{4m}$

=2:1