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Question 80

Which list shows the normal elemental molecular forms of fluorine, chlorine, bromine, and iodine?

  1. F, Cl, Br, I
  2. F2, Cl2, Br2, I2Correct answer
  3. F3, Cl3, Br3, I3
  4. F2, Cl, Br2, I

Explanation

Each of these four familiar halogens normally exists as a two-atom molecule, giving F2, Cl2, Br2, and I2. Writing isolated symbols treats the elements as monatomic, while formulas ending in 3 incorrectly make them triatomic.

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Question 80: Which list shows the normal elemental molecular forms of… · The Periodic Table and Elements · Questena