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BJU Physical Sci 2

BJU Physical Science - Ch 2 6th edition

TermDefinition
atom The building block of all matter; consists of protons, electrons, and (usually) neutrons.
compound A pure substance consisting of atoms of two or more elements that are chemically combined in a fixed ratio.
density The mass per unit volume of an object.
element A pure substance that consists of atoms with the same atomic number.
gas The state of matter in which particles are far apart, move rapidly, and have little interaction with each other.
heterogeneous mixture A mixture that does not have a uniform appearance since the combined substances are unevenly distributed.
homogeneous mixture A mixture that has a uniform appearance throughout; also known as a solution, especially of a solid dissolved in a liquid.
law of definite proportions The law that states that the masses of chemical substances combine in definite, characteristic integer ratios when forming compounds.
liquid The state of matter in which particles are close together but able to move around.
mass The measure of the amount of matter in an object.
matter Anything that has mass and occupies space.
mixture A physical combination of two or more substances in a changeable ratio.
molecule A particle consisting of two or more atoms covalently bonded together.
particle model of matter A model that states that all physical matter exists in the form of particles.
plasma A gas-like state of matter, formed at very high temperatures, that consists of high-energy ions and free electrons.
pure substance A material made of only one kind of element or compound.
solid The state of matter in which particles vibrate in fixed positions, giving a substance a fixed shape and volume.
volume The space enclosed or occupied by an object.
weight The force of gravity acting on the matter in an object.
Created by: marchscience
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