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Periodic Classification of Elements — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements2 Marks
Question
Explain why:
  1. All the elements of a group have similar chemical properties.
  2. All the elements of a period have different chemical properties.
✓

Answer

  1. All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell.
  2. All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.

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