Subject
Grade
Concept/Content
elements and compounds are pure substances
Elaboration
a pure substance consisting of a single type of atom, as distinguished by its atomic number (e.g., iron, copper)
a pure substance consisting of two or more different atoms held together in a defined special arrangement by chemical bonds (e.g., water/salt)
matter that consists of only one type of particle and has one set of properties (e.g., density, boiling point, solubility, conductivity)
keywords
elements
compounds
pure substances