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Grades 9–12. Students "time travel" through history to simulate past experiments and explore how critical discoveries shaped and modified modern atomic theory. They use models to describe atomic structure, learn how to use different atomic representations, and practice writing the electron configuration of an element using information from the periodic table. Applying their knowledge of atomic models, students finish the activity by creating detailed descriptions of a representation of an atom.

• Re-create the discoveries that led to modern atomic theory
• Model atoms based on information from the periodic table
• Observe and explain metal salt flame tests

Grades 9–12. Students "time travel" through history to simulate past experiments and explore how critical discoveries shaped and modified modern atomic theory. First, they connect their observations of a flame test to the movement of electrons between orbitals. Next, students use models to describe atomic structure, learn how to use different atomic representations, and practice writing the electron configuration of an element using information from the periodic table. Finally, they apply their knowledge of atomic models to create detailed descriptions of a representation of an atom. Kit (item #251219) includes materials for 30 students working in groups of 3. Kit Refill (item #251269) replenishes all the kit's consumable items.