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CHEM Holt 1

Matter and Change

TermDefinition
Chemistry The study of composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes associated.
Chemical Any substance with a definite composition
Volume The amount of space a substance takes up.
Mass The amount of matter in an object
Matter Anything that has both volume and mass
Atom The smallest unit of an element that retains the characteristics of that element.
Element A pure substance made of one type of atom.
Compound A substance that can be broken down into simpler substances by a chemical change. The atoms of two or more elements combined together in a chemical bond.
Extensive Properties Properties that depend on the amount of matter you have.
Intensive Properties Properties that are independent of the amount of matter you have.
Physical Property Any characteristic that can be observed without changing the identity or nature of the substance studied.
Physical Change A change in a substance that does not involve a change in identity or nature
Chemical Property Any physical characteristic of matter that requires a chemical change in order to detect/observe.
Chemical Change The ability to undergo changes that transform a substance into a new substance. Chemical properties generally cannot be seen until they happen.
Mixture A blend of two or more kinds of matter, each with its own identity and properties, not held together through chemical bonds.
* Homogeneous Having a uniform composition. Particles cannot be separated out by so-called “ordinary” means.
* Heterogeneous Not uniform throughout
Pure Substance Has fixed composition throughout. Every sample taken will retain the same physical and chemical properties and composition.
Compound The atoms of two or more elements combined together in a chemical bond.
Groups (Families) Vertical columns of elements on the periodic table.
Periods Horizontal rows of elements on the periodic table.
Created by: MrGross
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