40 task cards that will challenge students on common chemistry concepts about the atom and its structure, reactivity, valence electrons, properties of elements (metals, nonmetals, and metalloids). Task cards are so versitile and can be used for station labs, small groups, or whole class activities.Included in this product:- Atomic structure including the location, charge, and mass of protons, nuetrons, and electrons- Counting protons, neutrons, and electons given a model of an atom- Valence ele