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All matter is made of atoms, which are far too small to see directly through a light microscope. Elements have unique atoms and thus, unique properties. Atoms themselves are made of even smaller particles
Atoms may stick together in well-defined molecules or be packed together in large arrays. Different arrangements of atoms into groups compose all substances
The physical characteristics and changes of solid, liquid, and gas states can be explained using the particulate model
Distinguish among, explain, and apply the relationships among mass, weight, volume, and density