The radius of the second Bohr orbit,
Question:

The radius of the second Bohr orbit, in terms of the Bohr radius, $\mathrm{a}_{0}$, in $\mathrm{Li}^{2+}$ is :

  1. $\frac{4 \mathrm{a}_{0}}{9}$

  2. $\frac{2 a_{0}}{9}$

  3. $\frac{2 \mathrm{a}_{0}}{3}$

  4. $\frac{4 \mathrm{a}_{0}}{3}$


Correct Option: , 4

Solution:

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