The ratio of circumference of third and second orbits of He ion is — Atomic Structure Chemistry Question
Question
The ratio of circumference of third and second orbits of He$^+$ ion is
Answer: C
💡 Solution & Explanation
Circumference $2\pi r \propto r \propto n^2$. The ratio for 3rd and 2nd orbit is $3^2 : 2^2 = 9:4$. Therefore, correct answer is C.
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