How many protons and electrons does oxygen have?
Oxygen has 8 protons and 8 electrons.
If you refer to the periodic table, go to symbol "O" which represents Oxygen. The number on the top represents how many protons it has in its stable state. In the case of Oxygen it will be eight. Now when an atom is in stable state, number of protons will equal number of electrons. So Oxygen atom has eight electrons.