AP EAMCET202421 May 2024Evening ShiftChemistryStructure of AtomActual
The difference in radii between fourth and third Bohr orbits of He ⁺ (in m) is
Options
- A2.64 10⁻¹⁰
- B1.85 10⁻¹²
- C1.85 10⁻¹⁰
- D1.85 10⁻⁹
Correct answer
C. 1.85 10⁻¹⁰
Step-by-step solution
Bohr radii ( r _ n )=52.9 n ^2 Z pm radii of fourth orbit of He ⁺=52.9 (4)^2 2 radii of third orbit of He ⁺=52.9 (3)^2 2 difference of radii =52.9 (4)^2 2 -52.9 (3)^2 2 aligned & = 52.9 2 7 pm & =185.15 pm & =185.15 10⁻¹² ~m & =1.85 10⁻¹⁰ ~m aligned