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Modern Periodic Table — Chemistry STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryModern Periodic Table2 Marks
Question
Why elements of group 1 and group 2 are known as s-block elements?
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Answer

  • The subshell in which the last electron enters decides the block to which an element belongs.
  • In group 1 and group 2 elements, the last electron is filled in the s subshell.
Therefore, the elements of group 1 and group 2 are known as s-block elements.

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