Particle Practice Atomic number Protons Element Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminum Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium 1. What patterns did you notice on the table? 2. What does APE MAN represent? 3. How do you identify an atom? Neutrons Mass Number Electrons