Question

What is likely to be orbit number for a circular orbit of diameter 20 nm of the hydrogen atom :

• A. 10
• B. 14
• C. 12
• D. 16

Answer 1

Answer: (B)

14

Answer 2

Radius = 0.529 $\frac{n^{2}}{Z}Å = 10 \times 10^{- 9}m$

So, $n^{2} = 189 or, n \approx 14$