Listed in the Item Bank are some key terms and expressions associated with the categories seen in the Venn Diagram. To find out more information about items, some have more details available when you click on them. Drag and drop each item onto the proper area of the diagram. If an item describes more than one category, be sure to place it in the overlapping space. Contribute to the mass of an atom Determine the identity of an atom In the nucleus Mass equals 1 amu Neutral charge Number is atomic number of element Proton Both Neutron​