A) The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms
B) de-Broglie's wavelength is given by \[\lambda =\frac{h}{mv},\] where m = mass of the particle, v = group velocity of the particle
C) The uncertainty principle is \[\Delta E\times \Delta t\ge \frac{h}{4\pi }\]
D) Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement
Correct Answer: A
Solution :
[a] Energy of 2s-orbital and 2p-orbital in case of hydrogen like atoms is equal.
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