For an electron in an orbit, the relationship between total energy (E_T), potential energy (E_P), and kinetic energy (E_K) is E_T = (1/2)E_P = -E_K. Therefore, E_P = 2E_T. If the total energy is E₀, the potential energy is 2E₀. [cite: 237, 238, 240, 243, 244, 245]