The first excited state of hydrogen atom is `10.2 eV` above its ground state. The temperature is needed to excite hydrogen atoms to first excited level is

the energy required to excite an electron in hydrogen atom to its first excited state is

the energy required to excite an electron in hydrogen atom to its first excited state is

Statement I: The kinetic energy of an electron in the first excited state of a hydrogen atom is 6.8 eV. Statement II: Total energy of first excited state of hydrogen atom is -3.4 eV.

The excitation energy of first excited state of a hydrogen like atom is 40.8 eV . Find the energy needed to remove the electron to form the ion.

The groud state energy of hydrogen atom is -13.6 eV. The energy needed to ionise hydrogen atom form its second excited state in eV is