The Li ion ( ) possesses a single electron.

CHEMISTRY · Multi-part · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

The Li

^{2+}

ion (

Z=3

) possesses a single electron. (a) Calculate the speed of the electron when it is in the third stationary orbit (

n=3

). (b) Express this speed as a fraction of the speed of light

c = 3.0\times10^{8}\,\text{m s}^{-1}

and comment briefly on whether relativistic corrections are necessary for this orbit.