Calculate the radius of the first Bohr orbit of a `He^(+)` ion and the binding energy of its electron in the ground state.

Calculate the radius of the first Bohr orbit of a `He^(+)` ion and the binding energy of its electron in the ground state.
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Calculate the radius of the first Bohr orbit of a `He^(+)` ion and the binding energy of its electron in the ground state.
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