Question

An electron in ah atom in its ground state absorbs 1.5 times as much as the minimum required for its escape 13.6ev from the atom what is wavelength of the emitted electron

Answer 1

Answer:

will be 4.7 angstrom.

The ground state energy of electron is -13.6eV

So energy required to escape the electron is 13.6eV.

The energy given to electron is 13.6×1.5 = 20.4eV.

So the kinetic energy of emitted electron is = 20.4-13.6 = 6.8eV.

The wavelength of wave associated with electron moving with kinetic energy N eV is, (12.27) / (N^1/2) angstrom.

12.27/ (6.8)^1/2 = 4.7 angstrom.