For a hydrogen atom,the energy of the $n^{th}$ orbit is given by the equation $E \propto n^y$. What is the value of $y$?

Energy of an electron in the ground state of the hydrogen atom is $-2.18 \times 10^{-18} \ J$. Calculate the ionization enthalpy of atomic hydrogen in terms of $J \ mol^{-1}$.

Which of the following statements is correct regarding the properties of hydrogen-like species?

How many spectral lines of the Balmer series are present in the visible region?

When electronic transition occurs from a higher energy state to a lower energy state with an energy difference equal to $\Delta E$ electron volts,the wavelength of the emitted line is approximately equal to

The spectral series formed when electrons of excited hydrogen atoms return to the third orbit from higher energy orbits is