Question

What is the force between two alpha particles?

Answer 1

1. Beta radiation is the emission of electrons or positrons, whereas gamma radiation is the emission of strong photons.
2. Alpha radiation is the emission of an alpha particle, which is actually a helium nucleus.

The force between two alpha particles:

When two charged particles are separated by a distance of r, the electrostatic force between them is directly proportional to the multiplication of their charges and inversely proportional to the square of the distance between them, according to Coulomb's law.

Force $\left(F\right)\propto q_1\times q_2$
$F\propto \frac{1}{r^2}$
$F=k\frac{q_1\times q_2}{r^2}$

Where $k$ is a constant$=9\times {10}^9{\mathrm{Nm}}^2/{\mathrm{C}}^2$

Two alpha particles are there, so both charges are equal: $q_1=q_2=q$
Charge on one alpha particle $=q=+(2\times$ charge on an electron $)=+2\mathrm{e}$

Hence, the force between two alpha particles is $F=K\frac{q^2}{r^2}$.