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Which of the following arrangements shows increasing order of reactivity of the halogens?

Chemistry
WAEC 2016

Which of the following arrangements shows increasing order of reactivity of the halogens?

  • A. F2 > Cl2 > Br2 >I2
  • B. I2 < Br2 < Cl2< F2
  • C. F2 < Cl2 < Br2< I2
  • D. I2 > Br2 > Cl2 > F2
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Correct Answer: Option B
Explanation

The reactivity of halogens decreases as you move down Group 7.

Halogens become less reactive as you move down the group as the atomic radius of the element increases which means that the distance between the outer shell of electrons and the nucleus increases.


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