Atom Model Rubric You are to construct a 3-D model of an atom. You need to include protons, neutrons, electrons, nucleus, and at least 2 electron shells but non more than 3 electron shells. All parts must be labeled and spelled correctly. You will receive 2 grades for your model. A content grade and a appearance grade. Make sure to label your atom with the chemical symbol from the periodic table. Content: A -- has all the required parts, labeled, and spelled correctly. B—incorrect spelling or missing a label C—missing more than one label or a part D—missing many parts or labels F—No model, or missing most parts Appearance: A-- Has parts in correct amounts, in correct locations, appropriate sizes(protons at least 100 times bigger than the electrons), each part is clearly different(not just a different color of the same object), and looks nice. B—four of the above 5 are met C—three of the above 5 are met D—two of the above 5 are met