The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5A0 . Then the radius of the orbit of the electron in the third excited state of He+ ion is
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a
2A0
b
4A0
c
6A0
d
8A0
answer is B.
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Detailed Solution
rn=r0.n2Z,where r0=radius of bohr orbit∴ For He+ion,r4=0.5×422A0=4A0
The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5A0 . Then the radius of the orbit of the electron in the third excited state of He+ ion is