2007-03-18 16:15:18 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
"A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. For example, dihydrogen monoxide (water, ) is a compound composed of two hydrogen atoms for every oxygen atom."
Hence, O2 is an element.
2007-03-18 16:23:13 · answer #1 · answered by tenor_bone 2 · 0⤊ 0⤋
Element:
1. A species of atoms; all atoms with the same number of protons in the atomic nucleus,
2. A pure chemical substance composed of atoms with the same number of protons in the atomic nucleus.
So by definition 2, it is an element.
2007-03-19 00:12:00 · answer #2 · answered by greymatter 6 · 0⤊ 0⤋
Element.
A compound has to contain more than one kind of atom.
O2 is a molecule of oxygen.
2007-03-18 23:19:26 · answer #3 · answered by ecolink 7 · 0⤊ 1⤋