Lanthanide Contraction is phenomenon of block:
Correct answer: A. f block
- A. f block
- B. s block
- C. d block
- D. p block
Explanation
Lanthanide Contraction is a phenomenon observed in the lanthanide series (f-block elements). It refers to the gradual decrease in atomic and ionic radii across the lanthanide series due to the poor shielding effect of 4f electrons.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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