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  • I need help with Which one of the following is the wrong statement?

Which one of the following is the wrong statement?

  • Option 1)

    The uncertainty principle is:

    \Delta E \times \Delta t \leq \frac{h}{4 \pi}

  • Option 2)

    Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.

  • Option 3)

    The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen-like atoms.

  • Option 4)

    de-Broglie's wavelength is given by \lambda=\frac{h}{m\nu }

    where m=mass of the particle , v=group velocity of the partilce 

 

Answers (1)

best_answer

As learnt in

Total energy of elctron in nth orbit -

E_{n}= -13.6\: \frac{z^{2}}{n^{2}}eV

Where z is atomic number

-

 

for length 2s & 2p electrons, n = 2

\therefore they have the same energy.


Option 1)

The uncertainty principle is:

\Delta E \times \Delta t \leq \frac{h}{4 \pi}

This solution is incorrect

Option 2)

Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.

This solution is incorrect

Option 3)

The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen-like atoms.

This solution is correct

Option 4)

de-Broglie's wavelength is given by \lambda=\frac{h}{m\nu }

where m=mass of the particle , v=group velocity of the partilce 

This solution is incorrect

Posted by

prateek

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