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JEE Main2007Chemistryd and f Block ElementsActual

Identify the incorrect statement among the following

Options

  1. Ad- Block elements show irregular and erratic chemical properties among themselves
  2. BLa and Lu have partially filled d orbitals and no other partially filled orbitals
  3. CThe chemistry of various lanthanoids is very similar
  4. D4 f and 5 f orbitals are equally shielded

Correct answer

D. 4 f and 5 f orbitals are equally shielded

Step-by-step solution

4 f and 5 f belongs to different energy levels, hence the shielding effect is on them is not the same. Shielding of 4 f is more than 5 f . Hence (D) is correct.

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