1.9: Essential Elements for Life - Chemistry LibreTexts
https://chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_General_Chemistry%3A_Principles_Patterns_and_Applications_(Averill)/01%3A_Introduction_to_Chemistry/1.09%3A_Essential_Elements_for_Life
WebApr 12, 2023 · About 19 of the approximately 115 known elements are essential for humans. An essential element is one whose absence results …
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