The radius of the nth stationary orbit of hydrogen atom is proportional to
- A1/n²
- B1/n
- Cn²
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (c) n²
Explanation
In Bohr's model the radius of the nth orbit is rₙ = n²h²ε₀ / (πmZe²), which for hydrogen is 0.529 × n² Å.
So the radius is proportional to n²: the second orbit is 4 times and the third 9 times the radius of the first.