Question

the energy required to excite an electron of H-atom from first orbit to second orbit is

Answer 1

According to Bohr's model of hydrogen atom.,By the absorption of 13.6ev/atom(electron volts/atom) the electron of hydrogen atom get's excited to highest energy states

Answer 2

Answer:

The energy in the 1st shell of Hydrogen atom= - 13.6eV(electron volts).

 Ionisation Energy of Hydrogen atom = - 13.6eV.

The energy in the 2nd Shell of Hydrogen atom= - 3.4eV .

As n=1 for 1st orbit and n=2 for second orbit.

Hence to find the Energy required=Energy in 1st shell - 2nd shell energy.

-13.6eV -(- 3.4)eV = - 10.2eV .

Energy given by something is always positive = 10.2eV .

Hence the energy required to excite an electron from 1st orbit to second orbit will be 10.2eV.