PYQ NEET- Structure Of Atom L-8

Question: Which one is the wrong statement?#

A) The uncertainty principle is $$ \Delta E \times \Delta t \geq \frac{\hbar}{2} $$

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 $2 \mathrm{~s}$-orbital is less than the energy of 2 p-orbital in case of hydrogen like atoms.

D) de-Broglie’s wavelength is given by

$\lambda=\frac{h}{m v}$, where $\mathrm{m}=$ mass of the particle,

$\mathrm{v}=$ group velocity of the particle.

The energy of $2 \mathrm{~s}$-orbital is greater than the energy of 2 p-orbital in case of hydrogen like atoms. de-Broglie’s wavelength is given by#

Solution:#

In the case of hydrogen type atoms, energy depends on the principal quantum number only. Therefore 2-s orbital will have energy equal to 2-p orbital.