" The radius of hydrogen atom in the ground state is "52.9pm" .The radius of the first excited state of He "^(+)" ion will be "

The radius of hydrogen atom, in its ground state, is of the order of

The energy of a hydrogen atom in the ground state is -13.6 eV . The eneergy of a He^(+) ion in the first excited state will be

The radus of hydrogen atom in the ground state 0.53 Å . The radius of Li^(2+) ion (Atomic number = 3) in a similar state is

Bohr's radius for the H-atom (n =1) is approximately 0.53 Ã…. The radius of the first excited state (n=2) is :

The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 Å . The radius o fthe orbit of the electron in the third excited state of He^(+) will be