出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/07/19 12:23 UTC 版)
CHON (or CHNOPS) is an mnemonic acronym for the four (or six most essential) most common elements in living organisms: carbon, hydrogen, oxygen, and nitrogen. These four elements are also notable for being the least massive (and having the lowest atomic number) in their group in the periodic table.
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