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Key Terms: U2

Vocabulary for Chemistry

TermDefinition
Physical property property of a compound that can change without involving a change in chemical composition; examples-melting point and boiling point
chemical property any of a chemical's properties that became evident during a chemical reaction; examples-reactivity and flammability
physical change any change not involving a change in the substance's chemical identity. Includes a change from one state to another without a change in chemical composition.
chemical change any process determined by the atomic and molecular composition and structure of the substances involved
element a substance composed of atoms having an identical number of protons in each nucleus. It cannot be reduced to simpler substances through normal chemical means.
pure substance a sample of matter, either an element or a compound that consists of only one component with definite physical and chemical properties and a definite composition
compound a pure, macroscopically homogeneous substance consisting of atoms or ions of two or more different elements in definte proportions that cannot be seperated by physical means.
Mixtuure a composition of two or more substances that are not chemically combined with each other and are capable of being seperated
solution a homogeneous mixture of two or more substances, which may be solids, liquids, gases, or a commbination of these.
heterogeneous consisting of dissimilar parts. these mixtures have distinguishable phases
homogeneous uniform in structure or composition throughout. these mixtures have atoms and moleculres interspersed
alloy a homogeneous mixture or solid solution of two or more metals, the atoms of on replacing or occupying interstitial positions between the atoms of the other. Example- Brass is a combination of zinc and copper
distillation the evaporation and subsequent collection of a liquid by condensation as a means of purification
density the mass per unit of columes of a substance. Commonly measured on grams per millilliter or grams per cubic centimeter.
Matter anything that has mass and takes up space
Created by: ii_UnkownWaterz
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