Human body composition: Which element is present in the highest proportion (~65% by mass) in the human body? Consider overall elemental composition by mass in an average adult. Choose the correct option.
IIT JEE
Chemistry
Difficulty: Easy
Choose an option
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ACarbon
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BHydrogen
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COxygen
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DNitrogen
Answer
Correct Answer: Oxygen
Explanation
Concept/ApproachThe body is ~60% water by mass, and tissues contain oxygen-rich compounds; thus oxygen is ~65% by mass, more than carbon, hydrogen, or nitrogen.
Final AnswerOxygen