The valence electron in the lithium atom is moving with a speed of `1.8 xx 10^(6)"m/s"` in an orbit of radius 152 Å. Neglecting presence of other electrons in the atom, the magnetic moment of the valence electron is

Options

A. `2.19 xx 10^(-21)Am^(2)`
B. `2.19 xx 10^(-23)A m^(2)`
C. `4.38 xx 10^(-23)A m^(2)`
D. `4.38 xx 10^(-24)A m^(2)`

Answer

A