Uranium $238$ decays through a series of $\mathrm{\alpha } \& \mathrm{\beta }$ -decays to eventually form the stable isotope lead- $206$ in what is known as a decay chain.

Determine the number of each type of decay in the decay chain.

 Draw a diagram similar to Figure to show ${\mathrm{\beta }}^{+}$ - dacay.

A visual representation of the change within the neutron as it decays into a proton.

Write an equation to describe the changes in ${\mathrm{\beta }}^{+}$ - decay.

A visual representation of the change within the neutron as it decays into a proton.

The equation ${}_1{}^1\mathrm{p}\to {}_0{}^1\mathrm{n}+{}_{+1}{}^0\beta +\nu$ represents ${\beta }^{+}$ decay.

Use the equation to explain why the neutrino $\nu$ can have no charge and very little mass.