Which state of triply ionised Baryllium (Be+++) has the same orbital radius as that of the ground state of hydrogen

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n = 4

n = 3

n = 2

n = 1

answer is C.

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Detailed Solution

Radius of nth orbit for any hydrogen like atom rn=r0n2Z r0= radius of first orbit of H2−atom) If rn=r0⇒n=Z. For Be+++,Z=4⇒n=2

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