Statement (A): The potential energy of an electron = 2´ totalenergy

Statement (B): The kinetic energy of an electron =- total energy

Statement (C): ${\mathrm{r}}_{\mathrm{n}}=\frac{{\mathrm{n}}^2{\mathrm{h}}^2}{4{\mathrm{\pi }}^2{\mathrm{me}}^2\mathrm{Z}}$