NEET2017ChemistryStructure of AtomActual
Which one of the following statements is wrong?
Options
- Ade-Broglie's wavelength is given by λ = h mv , were m = mass of the particle, v = group velocity of t
- BThe uncertainty principle is ΔE × Δt ≥ h 4 π .
- CHalf-filled and fully-filled orbitals have greater stability due to the greater exchange energy, greater symme
- DThe energy of 2 s orbital is less than the energy of 2 p orbital in case of hydrogen-like atoms.
Correct answer
D. The energy of 2 s orbital is less than the energy of 2 p orbital in case of hydrogen-like atoms.
Step-by-step solution
(i) λ = h p = h mv (ii) Δx . Δp = h 4 π Δx × Δp × dt Δt ≥ h 4 π ∴ Δp Δt = f fΔx      Δt ≥ h 4 π , fΔx = ΔE ΔE . Δt ≥ h 4 π (iii) 3 rd statement is true. (iv) The energy of 2 s - orbital and 2 p - orbital in case of hydrogen like atoms is equal because they are single electron species.