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The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 A. The radius of the orbit of the electron in the third excited state of $H e^{+}$ will be

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8Å

4Å

0.5Å

0.25Å

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detailed solution

Correct option is B

For third excited state, n=4 rn=r0n22 or r1=0.5×4×42Å=4Å

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The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 A. The radius of the orbit of the electron in the third excited state of He+ will be

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The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 A. The radius of the orbit of the electron in the third excited state of $H e^{+}$ will be