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5 votes
Which one is not one of the most common elements of organic compounds?

A. Hydrogen
B. Helium
C. Nitrogen
D. Phosphorus

2 Answers

4 votes
I believe the correct answer among the choices listed above is option B. Helium is the substance that is not one of the most common elements of organic compounds. The most common element would be carbon, hydrogen, nitrogen and phosphorus.
User Xevincent
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7.2k points
4 votes
B. Helium without any doubt. :)
User Cantsay
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