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Dr. H LG07

Dr. Heiny: Learning Guide 07

Compound a substance made of two or more kinds of atoms that are chemically combined
Chemical change a change in the composition of a substance; a rearrangement of the atoms into a new substance
Chemical properties ability to form new substances
Elements substances containing only one type of atom
Matter has mass and occupies space.
Physical change a change in which the composition of the substance is not altered
Chemical reactions another term for chemical changes
Atom the fundamental unit of which elements are composed; the smallest sample of an element that has all the properties of that element, generally composed of the three subatomic particles (electrons, protons, and neutrons).
Chemical change the change of substances into other substances through a reorganization of the atoms; a chemical reaction.
Chemical properties Exhibited by matter as it undergoes changes in composition; The ability of a substance to change to a different substance.
Compound A pure substance with constant composition that can be broken down into elements by chemical processes.
Elements A pure substance that cannot be decomposed into simpler substances by chemical or physical means. It consists of atoms all having the same atomic number.
Extensive properties A non inherent property of a system, such as volume or internal energy, that changes with the quantity of material in the system; the quantitative value equals the sum of the values of the property for the individual constituents
Intensive properties properties independent of the quantity or shape of the substance under consideration; for example, temperature, pressure, or composition.
Gas One of the three states of matter; has neither fixed shape nor fixed volume
Liquid one of the three states of matter; has a fixed volume but takes the shape of its container.
Matter The material of the universe; anything that has mass and occupies space.
Molecule a bonded collection of two or more atoms of the same element or different elements.
Physical change a change from one state (solid or liquid or gas) to another without a change in chemical composition
Physical properties A characteristic of a substance that can be observed in the absence of change; that is, without the substance becoming a different substance.
Reaction a change or transformation in which a substance decomposes, combines with other substances, or interchanges constituents with other substances
Solid one of the three states of matter; has a fixed shape and volume.
States of matter The three different forms in which matter can exist: solid, liquid, and gas
Created by: LPH