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99 Percentile Qs Bank for JEE MainChemistryClassification of Elements and Periodicity in Properties

Identify the incorrect statement among the following.

Options

  1. AShielding power of 4f electrons is quite weak
  2. BThere is a decrease in the radii of the atoms or ions as one proceeds from La to Lu
  3. CLanthanide contraction is the accumulation of successive shrinkages.
  4. DAs a result of lanthanide contraction, the properties of 4d series of the transition elements have no similari

Correct answer

D. As a result of lanthanide contraction, the properties of 4d series of the transition elements have no similari

Step-by-step solution

The regular decrease in the radii of lanthanide ions from La 3+ to Lu 3+ is known as lanthanides contraction. It is due to the greater effect of the increased nuclear charge than that of screening effect (shielding effect). As a result of lanthanide contraction, the atomic radii of element of 4d and 5d comes closer, so the properties of 4d and 5d transition element shows the similarities.

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