| http://www.w3.org/ns/prov#value | - Key concepts include a) the particle theory of matter; b) elements, compounds, mixtures, acids, bases, salts, organic, inorganic, solids, liquids, and gases; c) characteristics of types of matter based on physical and chemical properties; d) physical properties (shape, density, solubility, odor, melting point, boiling point, color); and e) chemical properties (acidity, basicity, combustibility, re
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