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CHE 121: Chapter 1

Fundamentals of General, Organic, & Biological Chemistry

QuestionAnswer
Chemistry The study of the nature, properties, and transformations of matter.
Matter The physical material that makes up the universe; anything that has mass & occupies space.
Scientific Method The systematic process of observation, hypothesis, and experimentation used to expand and refine a body of knowledge.
Property A characteristic useful for identifying a substance or object.
Chemical Change A change in the chemical makeup of a sunstance.
Solid A substance that has a definite shape and volume.
Liquid A substance that has a definite volume but assumes the shape of its container.
Gas A substance that has neither a definite volume of shape.
State of Matter The physical state of a substance as a solid, liquid, or gas.
Change of State The conversion of a substance from one state to another- for example, from liquid to gas.
Pure Substance A substance that has a uniform chemical composition throughout.
Mixture A blend of two or more substances, each of which retains its chemical identity.
Element A fundamental substance that cannot be broken down chemically into any simpler substance.
Chemical Compound A pure substance that can be broken down into simpler substances by chemical reactions.
Reactant A starting substance that undergoes change during a chemical reaction.
Chemical Reaction A process in which the identity and composition of one or more substances are changed.
Chemical Formula A notation for a chemical compound using element symbols and subscripts to show how many atoms of each element are present.
Periodic Table A tabular format listing all known elements.
Metal A malleable element with a lustrous appearance that is a good conductor of heat and electricity.
Nonmetal An element that is a poor conductor of heat and electricity.
Metalloid An element whose properties are intermediate between those of a metal and a nonmetal.
What kind of properties does matter have? Physical Properties & Chemical Properties
Physical Properties can be seen or measured without changing the chemical identity of the substance.
Chemical Properties can ONLY be seen or measured when the substance undergoes a chemical change, such as a chemical reaction.
Created by: 1084741287