# The velocity of an electron in its fifth orbit, if the velocity of an electron in the second orbit of sodium atom (atomic number = 11) is $\mathcal{v}$, will be :

$\mathcal{v}$

$\frac{22}{5}\mathcal{v}$

$\frac{5}{2}\mathcal{v}$

$\frac{2}{5}\mathcal{v}$

Please do not use chat terms. Example: avoid using "grt" instead of "great".