What polyatomic ion contains the greatest number of oxygen atoms?

1 Answer
Feb 16, 2017


See below.


The first inorganic ion I think of is the peroxodisulfate ion, #"S"_2"O"_8^"2-"#.

Its structure is


An important polyatomic organic ion is ATP (adenosine triphosphate).


It contains 9 oxygen atoms in the phosphate groups plus 4 more from the ribose unit.

And we must not forget DNA.


A DNA strand can contain up to 2.5 million nucleotide pairs.

Each nucleotide contains 2 oxygen atoms in the phosphate and 3 from the deoxyribose.

With 12.5 million oxygen atoms plus those in the purine and pyrimidine bases, I suppose you could say that ATP is the polyatomic ion with the most oxygen atoms.