Describe the atomic model and explain how the types and arrangements of atoms determine the physical and chemical properties of elements and compounds.
Systems and their components function at various levels of complexity.
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Explain that all matter is made of atoms, elements are composed of a single kind of atom, and compounds are composed of two or more different elements.
Describe physical and chemical properties of matter and how they can be measured.
Develop models to describe the atomic composition of simple molecules and extended structures.