Use $a_0=0.529\text{A˚}$. The radius of the third Bohr orbit of $\mathrm{He}{}^{+}$ is

More questions on Bohr model: energy, radius, velocity, ionisation energy

• Take E_1 = -13.6 eV for hydrogen. The ionisation energy of the ground-state He+ ion is NEET level
• The speed of the electron in the second Bohr orbit of hydrogen, compared with its speed in the first orbit, is NEET level
• Take E_1 = -13.6 eV for hydrogen. The energy of an electron in the n=2 level of Li^2+ is JEE Main level
• The speed of the electron in the n=2 orbit of B^4+ is how many times the speed of the electron in the first orbit of hydrogen? JEE Main level
• Using E_1 = -13.6 eV, the minimum energy needed to excite a ground-state hydrogen atom to the n=3 level is JEE Main level
• Take E_1=-13.6 eV for hydrogen. In the n=2 level of Be^3+, the potential energy of the electron is JEE Main level