Chemistry in Context: Chapter 1
1. composition: a description of the identity and structure of the subunits that
comprise a substance or material
2. matter: any solid, liquid, gas, or plasma that occupies space and has a mass
3. homogeneous mixture: a single-phase combination of solids, liquids, or gases
with a uniform distribution of its constituents throughout the substance
4. solution: a homogeneous (of uniform composition) mixture of a solvent and one
or more solutes
5. heterogeneous mixture: a combination of solids, liquids, or gases that are not
uniformly distributed throughout the substance
6. physical change: making or breaking up a mixture; change of state, heat,
squeeze pressure
7. chemical change: making or breaking a compound; color change, gas evolution,
heat, precipitate
8. atom: the smallest unit of an element that can exist as a stable, independent entity
9. element: one of the 100 or so pure substances in our world from which compounds
are formed; contains only one type of atom
10. compound: a pure substance that is comprised of two or more different types
of atoms in a fixed, characteristic chemical combination
11. chemical formula: a symbolic way to represent the elementary composition of
a substance. It reveals both the elements present (by chemical symbols) and the
atomic ratio of those elements (by the subscripts)
12. molecule: two or more atoms held together by chemical bonds in a certain
spatial arrangement
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1. composition: a description of the identity and structure of the subunits that
comprise a substance or material
2. matter: any solid, liquid, gas, or plasma that occupies space and has a mass
3. homogeneous mixture: a single-phase combination of solids, liquids, or gases
with a uniform distribution of its constituents throughout the substance
4. solution: a homogeneous (of uniform composition) mixture of a solvent and one
or more solutes
5. heterogeneous mixture: a combination of solids, liquids, or gases that are not
uniformly distributed throughout the substance
6. physical change: making or breaking up a mixture; change of state, heat,
squeeze pressure
7. chemical change: making or breaking a compound; color change, gas evolution,
heat, precipitate
8. atom: the smallest unit of an element that can exist as a stable, independent entity
9. element: one of the 100 or so pure substances in our world from which compounds
are formed; contains only one type of atom
10. compound: a pure substance that is comprised of two or more different types
of atoms in a fixed, characteristic chemical combination
11. chemical formula: a symbolic way to represent the elementary composition of
a substance. It reveals both the elements present (by chemical symbols) and the
atomic ratio of those elements (by the subscripts)
12. molecule: two or more atoms held together by chemical bonds in a certain
spatial arrangement
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