The charge can be balanced by adding electrons to the left hand side to give a balanced complex ion-electron equation: \(C{r_2}O{_{7}}^{2-}(aq) + 14{H^ + }(aq) + 6{e^ - } \to 2C{r^{3 ...

The emission of beta radiation provides evidence that neutrons and protons are made up of quarks. Beta (\(\beta^-\)) decay is the release of an electron by the change of a neutron to a proton.