1.

Give the similarities and differences in elements of 3d, 4d and 5d series.

Answer»

Similarity :

  • They are placed between .s-block and p-block of the periodic table.
  • All elements are metals showing metallic characters.
  • Some are paramagnetic.
  • Most of them give coloured compounds.
  • They have catalytic properties.
  • They form complexes.
  • They have variable oxidation states.

Differences :

  • In 4d and 5d series lanthanide and actinoid contraction is observed. In 3d series atomic size changes are less marked.
  • 4d and 5d elements have high coordination numbers compared to 3d elements.
  • 4d and 5d series have similar properties whereas 3d series have different properties.


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