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NEETChemistryClassification of Elements and Periodicity in Properties

What determines the placement of elements in the s-Block of the Periodic Table?

Options

  1. AThe number of protons in the nucleus
  2. BThe number and distribution of electrons in the outermost orbitals
  3. CThe number of neutrons in the nucleus
  4. DThe atomic number

Correct answer

B. The number and distribution of electrons in the outermost orbitals

Step-by-step solution

The elements of Group 1 (alkali metals) and Group 2 (alkaline earth metals) which have ns1 and ns2 outermost electronic configuration belong to the s-Block Elements.

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