MHT CET20243 May 2024Morning ShiftChemistryStructure of AtomActual
What is the amount of energy associated with first orbit of monopositive helium ion? [ R _ H =2.18 10⁻¹⁸ ~J ]
Options
- A-1.9 10⁻¹⁸ ~J
- B-4.36 10⁻¹⁸ ~J
- C-6.54 10⁻¹⁸ ~J
- D-8.72 10⁻¹⁸ ~J
Correct answer
D. -8.72 10⁻¹⁸ ~J
Step-by-step solution
For the first orbit of monopositive He ⁺ ion, Z =2, n =1 aligned & E_n=-2.18 10⁻¹⁸ ( Z^2 n^2 ) J & E₁=-2.18 10⁻¹⁸ ( 2^2 1^2 )=4 2.18 10⁻¹⁸ aligned E ₁=-8.72 10⁻¹⁸ ~J