Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas! • Use the number of protons, neutrons, and electrons to draw a model of the atom, identify the element, and determine the mass and charge. • Predict how addition or subtraction of a proton, neutron, or electron will change the element, the charge, and the mass. • Use the element name, mass, and charge to determine the number of protons, neutrons, and electrons. • Define proton, neutron, electron, atom, and ion. • Generate an isotopic symbol for an atom, given the number of protons, neutrons, and electrons.