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Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom3 Marks
Question
  1. Define principal quantum number(n).
  2. Write the electronic configuration of Cr+ [Atomic number of Cr = 24].
  3. Define Pauli's exclusion principle.
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Answer

  1. Principal quantum number tells the principal energy level or shell to which the electron belongs. It gives the information about the distance and the energy of the electron.
  2. Cr+ = 1s2 2s2 2p6 3s2 3p6 3d5
  3. Pauli's exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers.

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