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[ Question Bank ] - 2022 — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10Science[ Question Bank ] - 20222 Marks
Question
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
✓

Answer

  1. Electronic configuration of lithium is (2, 1). Electronic configuration of sodium is (2, 8, 1).
  2. Both lithium and sodium have single electron in their outermost shell.
  3. Their valency is 1.
  4. In the periodic table, elements belonging to the same group have the same valency. Hence, lithium and sodium are included in the same group in periodic table.

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