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Removed: 4d3
Removed: 8d6
Changed: 20c18
- 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