Atoms And Nuclei Question 106

Question: Radius of the first orbit of the electron in a hydrogen atom is 0.53 Å. So, the radius of the third orbit will be [Kerala (Engg.) 2001]

Options:

A) 2.12 Å

B) 4.77 Å

C) 1.06 Å

D) 1.59 Å

Show Answer

Answer:

Correct Answer: B

Solution:

rn∝n2⇒r3r1=321⇒r3=9r1=9×0.53=4.77\AA

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