MHT CET202122 Sep 2021Evening ShiftChemistryStructure of AtomActual
What is the energy of an electron in stationary state corresponding to n =2 ?
Options
- A-1.45 10⁻¹⁸ ~J
- B-0.545 10⁻¹⁸ ~J
- C-3.45 10⁻¹⁸ ~J
- D-2.5 10⁻¹⁸ ~J
Correct answer
B. -0.545 10⁻¹⁸ ~J
Step-by-step solution
The energy of the stationary state is given by aligned & E =- R _ H 1 n ^2 & R _ H = Rydberg constant =2.18 10⁻¹⁸ ~J & E =-2.18 10⁻¹⁸ 1 2^2 & =-0.545 10⁻¹⁸ ~J . aligned