Question

2. Which one is the wrong statement?
(1) de-Broglie's wavelength is given by À = mv.
where m = mass of the particle, v = group
velocity of the particle
(2) The uncertainty principle is AEXAT?
(3) Half-filled and fully filled orbitals have greater
stability due to greater exchange energy,
greater symmetry and more balanced
arrangement
(4) The energy of 2s orbital is less than the energy
of 2p orbital in case of Hydrogen like atoms​

Answer 1

Option 3rd is Right

de broglie's wavelength = h/p

Energy of 2s & 2p orbital is equal in Hydrogen like species