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Chemistry Vocabulary

Vocabulary for Classification of Matter Unit 1

acid a solution with a pH less than 7
atom the smallest part of an element that has the chemical properties of that element
balanced chemical equation a chemical equation that has the same number of each kind of atom in the reactants as in the products
base a solution with a pH greater than 7
boiling point the temperature at which a liquid boil
brittle tending to break or shatter easily
Chemical change a change in matter that results in the formation of one or more new substances that have new chemical and physical properties
Chemical equation a way of using chemical formulas and chemical symbols to describe the changes that occur in a chemical reaction
Chemical formula a way of using chemical symbols & subscripts to identify the number of atoms of each element in a molecule
Chemical property Chemical symbol: a shorthand name for an element a characteristic that describes how a substance will react (combine) or not react chemically with other substances
Chemical reaction a chemical change that results in the formation of one or more new substances
Chemical symbol a shorthand name for an element
Coefficient a number written before a chemical formula that shows how many molecules of that substance are involved in a chemical reaction
Density a measure of the mass of a substance compared to its volume
Family the elements found in a vertical column in the periodic table of elements
Indicator a substance that can be used to determine if a solution is acidic, basic, or neutral
Malleable able to be hammered into different shapes
Compound a pure substance composed of two or more elements that are chemically combined
Conductor a material that allows heat or electricity to move through it easily
Ductile able to be drawn or stretched into thin wire
Element a pure substance that cannot be changed into a simpler substance
Heterogeneous mixture a mixture that is not uniform throughout
Homogeneous mixture a mixture in which the substances are evenly mixed
Law of conservation of matter the law which states that in a chemical reaction, matter is neither created nor destroyed
Luster the tendency to reflect light
Matter anything that has mass and takes up space
Melting point the temperature at which a solid changes to a liquid
Mixture a combination of two or more pure substances
Nonconductor a material that does not allow heat or electricity to move through it easily
pH a measure of how acidic or basic a substance is
Physical property a characteristic of a substance that can be observed and measured without changing the substance
Pure substance a substance made up of only one kind of atom or molecule
State of matter the physical form in which matter exists
Molecule a particle that forms when two or more atoms are held together by a chemical bond
Neutral solution a solution with a pH of 7
Period a horizontal row of elements in the periodic table
Periodic Table of elements a chart that arranges elements according to their chemical and physical properties
pH scale a scale, ranging from 0 to 14, that measures how acidic or basic a solution is
physical change a change that alters the physical properties of a substance without changing the composition of the substance
Precipitate a solid substance that forms when two solutions are combined
Product a new substance formed by a chemical reaction
Reactant a substance that is broken apart or joined with another substance by a chemical reaction
Solution a homogeneous mixture in which the particles are too small to be seen easily
Subscrip a number, written below and to the right of an element, that shows how many atoms of each element are in a molecule
Created by: mbowles