I belong to a group that's highly reactive and often found in compounds, but alone, I'm a gas. Who am I?
Category: Science · Difficulty: hard
Hint: I can be found in bleach and swimming pools.
Answer
Chlorine
Explanation
Chlorine is a highly reactive element that is a gas at room temperature and is commonly used in disinfectants.
This is a hard science riddle — a tricky one that takes a little thought. The answer is Chlorine.
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