Question

Which one of following is a wrong statement?

• A. The uncertainty principle is $\Delta E\times \Delta t\geq h/4\pi $
• B. Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.
• C. The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms.
• D. De-Broglies’s wavelength is given by $\lambda =\frac{h}{m v},$ where m = mass of the particle, v = group velocity of the particle.

Answer 1

Answer: (C)

In case of Hydrogenic species is 1s < 2s = 2p < 3s = 3p = 3d
Hence, 2s and 2p have same energy for Hydrogenic species.
The rest of the statements are correct.