An atomic number of oxygen is:

1. 5
2. 8
3. 11
4. zero
5. None of these

Oxygen is the chemical element with the symbol O and atomic number 8.

Oxygen Discoverers: Joseph Priestley, Antoine Lavoisier, Carl Wilhelm Scheele

Oxygen Symbol: O

Oxygen Atomic number: 8

Oxygen Electrons per shell: 2, 6