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The d-and f-Block Elements

  • The d-block elements are known as transition metals.

  • The f-block elements are known as inner transition metals.

  • 4f – metals → lanthanoids

  • 5f – metals → actinoids

Electronic Configuration

  • General outer electronic configuration is (n −1)d1−10 ns1−2.

Zn, Cd, and Hg are not regarded as transition elements.

Reason − The orbitals of these elements are completely-filled. [Electronic configuration is (n − 1) d10 ns2]


The d-block elements (transition metals):

  • The d-block elements (group 3 – 12) occupy the large, middle section of the periodic table.

  • In general, t…

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