The periodic table is a well-organized chart that contains all the known elements in the universe. These elements are ...

Each dot represents an electron. Since the atomic number of oxygen is 8, it will have 8 protons in the nucleus. An atom of oxygen is neutral and so will have 8 electrons. Two electrons will fill ...

Since this atom has a total of eight electrons, it also has eight protons. The atom with eight protons in its nucleus (atomic number 8) is oxygen. Each energy level holds a certain number of electrons ...