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The d & f Block Elements — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Variable valency is characteristic of:
  • A
    Halogen.
  • B
    Transition elements.
  • C
    Alkali metals.
  • D
    Noble gas.
✓

Answer

  1. Transition elements.

Explanation:

In transition metals, (n−1) d and ns electrons have nearly same energy level. Hence, most of these electrons take part in chemical bonding. Hence, transition metals show variable valency.

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