${\rm{0}}{\rm{.025}}\, imes {\rm{1}}{{\rm{0}}^4}\,{{\rm{m}}^{ - 1}}\,$

${\rm{0}}{\rm{.5}}\, imes {\rm{1}}{{\rm{0}}^7}\,{{\rm{m}}^{ - 1}}$

${\rm{0}}{\rm{.25}}\, imes {\rm{1}}{{\rm{0}}^7}\,{{\rm{m}}^{ - 1}}$

${\rm{2}}{\rm{.5}}\, imes {\rm{1}}{{\rm{0}}^7}\,{{\rm{m}}^{ - 1}}$

$2.12\,\,{A^0}$

$4.77\,\,{A^0}$

$1.06\,\,{A^0}$

$1.59\,\,{A^0}$

${\rm{0}}{\rm{.025}}\, imes {\rm{1}}{{\rm{0}}^4}\,{{\rm{m}}^{ - 1}}\,$

${\rm{0}}{\rm{.5}}\, imes {\rm{1}}{{\rm{0}}^7}\,{{\rm{m}}^{ - 1}}$

${\rm{0}}{\rm{.25}}\, imes {\rm{1}}{{\rm{0}}^7}\,{{\rm{m}}^{ - 1}}$

${\rm{2}}{\rm{.5}}\, imes {\rm{1}}{{\rm{0}}^7}\,{{\rm{m}}^{ - 1}}$

$13.6\,\,eV$

$13.6\,\, imes \,\,11\,\,eV$

$\frac{{13.6}}{{11}}eV$

$13.6\,\, imes \,\,{\left( {11} \right)^2}\,\,eV$

$24.6\,\,eV$

$24.6\,\,V$

$13.6\,\,V$

$13.6\,\,eV$

$2.12\,\,{A^0}$

$4.77\,\,{A^0}$

$1.06\,\,{A^0}$

$1.59\,\,{A^0}$

Equal to one fourth the circumference of the first orbit

Equal to half the circumference of the first orbit

Equal to twice the circumference of the first orbit

Equal to the circumference of the first orbit

$\frac{{25}}{9}$

$\frac{{17}}{6}$

$\frac{{9}}{5}$

$\frac{{4}}{3}$

10.2 eV

12.1 eV

1.89 eV

3.4 eV

$\pi {r^2}$

$2\pi r$

$\pi r$

$\sqrt {2\pi r}$

$182.51\,\,{A^0}$

$177.17\,\,{A^0}$

$142.25\,\,{A^0}$

$113.74\,\,{A^0}$