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avogadro's number

number of particles in one mole of a substance; 6.02 x 10^23

chemical equation

the statement showing how substances react using chemical formula


two or more substances bonded together through a chemical equation.


a substance that can react like an acid and a base


the fundamental building blocks of matter

atomic mass

the exact mass of an atom

atomic number

the number of protons in an element; defines the element

barometric pressure

the pressure of the atmosphere at a specific location


a substance that forms OH- in water or a proton acceptor

chemical equation

the statement showing how substances react using chemical formulas

chemical formula

the symbols and subscripts showing the composition of a compound

chemical properties

characteristics describing how a substance reacts with other substances

covalent bond

a chemical bond where atoms share electrons


the mass divided by the volume


the heat energy gained or lost during a chemical reaction


a measure of the randomness of a reaction

polyatomic ion

an ion composed of more than one element


an ionic compound formed by the reaction of an acid and a base


elements that have characteristics of both metals and non-metals

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