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atom-the smallest unit of an element
element-basic building block of physical matter; cannot be broken down to a simpler form
molecule-a single unit of a compound or group of elements bonded together
compound-a chemical substance of two or more atoms of elements bonded together
periodic table-a chart organizing chemical elements that compose all matter; listed by atomic number and related groups
solid-state of matter composed of tightly packed molecules, resulting in a firm substance
liquid-state of matter composed of freely moving molecules that do not usually separate
gas-state of matter composed of freely moving molecules capable of indefinite expansion
phase change-a change from one state of matter to another
physical property-property of a substance that can be measured without changing chemical properties
solubility-the amount of a solute that can be dissolved into a liquid(solvent) in a give situation
boiling point-temperature at which a liquid boils
melting point-temperature at which a solid melts
freezing point-temperature at which a liquid freezes
density-amount of mass per unit of volume(D=m/v)
mass-a measure of the total amount of matter contained within an object
volume-a measure of the amount of space an object fills
weight-a measure of the gravitational force acting on an object
triple-beam balance-used to measure mass
solvent-any liquid that dissolves a substance
solute-the substance that gets dissolved in a solution
pure substance-a substance that is compsed of only one type of atom or molecule
temperature-a measure of the warmth or coldness of an object or substance
chemical change-the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance
specific heat-the number of calories required to raise the temperature of 1 gram of a substance 1°C
chemical reactivity-the tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy
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