the most common and important natural oxygen is... *
1 point
Indole 3 acetic acid
Indole butyric acid
Naphthalene acetic acid
phonexy acetic acid
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Answer:
l guses 3 optional but not sure
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Naturally occurring oxygen is composed of three stable isotopes, 16O, 17O, and 18O, with 16O being the most abundant (99.762% natural abundance).
In the Earth's crust: 461000 ppm
Allotropes: O2, O3 (ozone)
Natural occurrence: primordial
Group: group 16 (chalcogens)
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