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Why there are exemptions in writing the electronic configurations of Chromium and Copper ?

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AAKASH SERIES-ATOMIC STRUCTURE-Subjective Exercise - 3 (Short answer questions)
  1. Which of the following sets of quantum numbers is correct for an elect...

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  2. Which one of the following is a correct electronic configuration of so...

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  3. Why there are exemptions in writing the electronic configurations of C...

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  4. What is an atomic orbital ?

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  5. How many P - electrons are present in sulphur atom ?

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  6. How many electrons are present in sulphur ?

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  7. What are the values of principal quantum number (n) and azimuthal quan...

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  8. The electronic configuration of Magnesium (Mg) is

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  9. To which element do the following electronic configuration correspond ...

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  10. Explain the significance of sodium , potassium, magnesium and calcium ...

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  11. What is Hund's rule ?

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  12. Explain Pauli's Exclusion principle with an example.

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  13. What is the principle involved in dialysis?

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  14. Which of the following orbitals are possible ? (2s,1p,3f,2p)

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  15. How many sub-shells are associated with n=4 ? How many electrons will ...

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  16. The bromine atom possesses 35 electrons. It contains 6 electrons in 2p...

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  17. What is principal quantum number and explain its significance?

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  18. What its azimuthal quantum number and explain its significance?

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  19. Write the Schrodinger wave equation and explain each term in it.

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  20. What is Aufbau's principle? Give the sequence in which various orbital...

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