Radium$-226$ decays into radon$-222$ plus an alpha particle. How much energy is released in this

process? $1$ u $=931\mathrm{.}494$ MeV$/$c$2.$ The relevant mass values are:$4$

$2$ He $,4\mathrm{.}002603$ u;$222$

$86$ Rn

$,222\mathrm{.}017570$ u;$226$

$88$ Ra $,226\mathrm{.}025402$ u$.$