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A lithium atom has three electrons, Assu...

A lithium atom has three electrons, Assume the following simple picture of the atom. Two electrons move close to the nucleus making up a spherical cloud around it and the third moves outside this cloud in a circular orbit. Bohr's model can be used for the motion of this third electron but n = 1 states are not available to it. Calculate the ionization energy of lithium in ground state using the above picture. In this picture, the third electron moves in the field of a total charge + 3e - 2e = + e. Thus, the energies are the same as that of hydrogen atoms. The lowest energy is : on : E Ez = = -13.6 ev __3.4 eV 4 Thus, the ionization energy of the atom in this picture is 3.4 eV.

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