Entity corresponding to the transfer of a $\ce{H^{+}}$ ion in a neutralization reaction, of an electron in a redox reaction, or to a magnitude of charge number equal to 1 in ions. Examples: \(\frac{1}{2}\) $\ce{H2SO4}$, \(\frac{1}{5}\) $\ce{KMnO4}$, \(\frac{1}{3}\) $\ce{Fe^{3+}}$.