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IGCSE A Level Chemistry MCQs – Practice Test 2 (Chapter 9)

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The "Electrons in Atoms MCQ" App Download (iOS & Android): Electrons occupy separate orbital within the same sub-shell to reduce; MCQ with answers: repulsion, attraction, polarity, and conductivity. Practice Nucleophilic Substitution Reactions Quiz Questions, download Apple Book (Free Chapter) to enhance chemistry digital credentials.

Electrons in Atoms MCQ PDF Download – Practice Test 2

MCQ 6: The electronic configuration of chromium is:

  1. [Ar]2d5,4s1
  2. [Ar]2d4,4s2
  3. [Ar]2d5,4s2
  4. [Ar]2d4,4s1

MCQ 7: Electrons occupy separate orbital within the same sub-shell to reduce:

  1. attraction
  2. repulsion
  3. polarity
  4. conductivity

MCQ 8: The magnitude of ionization energy depends upon:

  1. number of positive charges
  2. shielding effect increases
  3. spin pair repulsion
  4. all of above

MCQ 9: Whenever there is no empty orbital is available within sub-shell, electrons are:

  1. deflected
  2. reflected
  3. paired
  4. charged

MCQ 10: There is less attraction between the fifth electron of Boron and nucleus, hence that electron resides in:

  1. 1s
  2. 2p
  3. 3s
  4. 4d

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