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*Big Idea 1 **The chemical elements are fundamental building materials of matter, and all matter can be understood in terms of arrangements of atoms. These atoms retain their identity in chemical reactions *Big Idea 2 **Chemical and physical properties of materials can be explained by the structure and the arrangement of atoms, ions, or molecules and the forces between them *Big Idea 3 **Changes in matter involve the rearrangement and/or reorganization of atoms and/or the transfer of electrons *Big Idea 4 **Rates of chemical reactions are determined by details of the molecular collisions *Big Idea 5 **The laws of thermodynamics describe the essential role of energy and explain and predict the direction of changes in matter *Big Ideal 6 **Any bond or intermolecular attraction that can be formed can be broken. These two processes are in dynamic competition, sensitive to initial conditions and external perturbations |