The radius of third orbit of hydrogen atom is Rpm. The radius of second orbit of He^+ion (in pm is)

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Accepted Answer

Correct answer: D. (d) Radius =0.529 n^2Z for 3^ rd orbit (of H atom) ; r_3=R= 0.529 9Z=4.761 pm ( asz=1 ) Now, for 2^ nd orbit (of He^+); r_2= 0.529 (2 )^22=1.058 pm ⇒r_2= 29r_3 or 29 Rpm

$The radius of third orbit of hydrogen atom is Rpm . The radius of second orbit of He^{+} ion (in pm is)$

Solution

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