There are 8 protons in an oxygen atom. In an O2 molecule, which is what is in the air we breathe, there are 16.
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Number of neutrons？
To find the number of protons in oxygen, you can refer to the periodic table. Oxygen is represented by the symbol "O." Locate oxygen on the periodic table, and you will find its atomic number, which is 8. The atomic number of an element represents the number of protons in the nucleus of an atom. Therefore, oxygen has 8 protons.
