How long can a single chlorine atom survive in the atmosphere?

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Prepare for the SkillCat EPA Type 2 Test with interactive flashcards and multiple-choice questions. Each question is accompanied by hints and explanations. Get ready to pass your exam!

Multiple Choice

How long can a single chlorine atom survive in the atmosphere?

Explanation:
Chlorine can linger in the atmosphere because it’s often tucked away in stable reservoir molecules rather than existing as a free, highly reactive atom. When chlorine-bearing compounds (like those released from human-made sources) break down in the upper atmosphere, chlorine is rapidly converted into jellies like HCl and ClONO2. These reservoir species are relatively persistent, so the chlorine is effectively stored for years before it is released again to participate in chemical cycles. This long sequestration means a single chlorine atom can remain in the atmospheric system for years, even though its free form would be short-lived.

Chlorine can linger in the atmosphere because it’s often tucked away in stable reservoir molecules rather than existing as a free, highly reactive atom. When chlorine-bearing compounds (like those released from human-made sources) break down in the upper atmosphere, chlorine is rapidly converted into jellies like HCl and ClONO2. These reservoir species are relatively persistent, so the chlorine is effectively stored for years before it is released again to participate in chemical cycles. This long sequestration means a single chlorine atom can remain in the atmospheric system for years, even though its free form would be short-lived.

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