Question

Calculate the largest wavelength which can remove the electron from 1 Bohr's orbit. Given E1E1 = 13.6 eV

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Answer 1

*According to Bohr's model of hydrogen atom, energy of an electronic in any shell is given by the equation

E=-13.6÷n2

*For 3rd orbit, value of n is 3. Therefore energy of 3rd orbit is -1.51 ev

*For ground state, value of n is 1. Therefore energy is -13.6 ev

*So the answer to your question is

-1.51-(-13.6) = 12.09 ev

*Also for quicker calculations you may prefer to by heart some of the values of energy of electron in different shells.

*It may come helpful as you advance further in the chapter and study Hydrogen spectrum.

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