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Question: Answered & Verified by Expert
The increasing order of reactivity among group 1 elements is Li < Na < K < Rb < Cs, whereas that among group 17 elements is F > Cl > Br > I. Which of the following options explain this distinction?
ChemistryClassification of Elements and Periodicity in PropertiesNEET
Options:
  • A Group 1 elements are non-metals, while Group 17 elements are metals.
  • B Group 1 elements have higher electronegativity, while Group 17 elements have lower electronegativity.
  • C Group 1 elements have one valence electron, while Group 17 elements have seven valence electrons.
  • D Group 1 elements have higher ionisation energies, while Group 17 elements have lower ionisation energies.
Solution:
2836 Upvotes Verified Answer
The correct answer is: Group 1 elements have one valence electron, while Group 17 elements have seven valence electrons.
Correct Option is : (C)
Group 1 elements have one valence electron, while Group 17 elements have seven valence electrons.

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