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Chapter 1

Chemistry - Holt

Side 1Side 2
Chemical Reaction the process by which one or more substances change to produce one or more different substances
Reactant a substance or molecule that participates in a chemical reaction
Product a substance that froms in a chemical reaction
Matter Anything that has mass and takes up space
Volume a measure of the size of a body or region in three-dimensional space
Mass a measure of the amount of matter in an object; a fundamental property of an object that is not affected by the forces that act on the object, such as the gravitational force.
Weight a measure of the gravitational force exerted on an object; its value can cahnge with the location of the object in the universe.
Quantity something that hs magnitude, size, or amount
Unit a quantity adopted as a standard of measurement
Conversion factor a ration that is derived from the equality of two different units and that can be used to convert from one unit to the other
Physical property a characteristic of a substance that does not involve a chemical cahnge, such as density, color or hardness.
Density the ration of the mass of a substance to the volume of the substance; often expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases.
Chemical Property A property of matter that describes a substance's ability to participate in chemical reactions
Atom the smallest unit of an element that maintains the properties of that element
Pure substance a sample of amtter, either a single element or a single compound, that has definite chemical and physical properties.
Element A substance that cannot be separated or broken down into simpler substance by chemical means; all atoms of an elemetn have the same atomic number
Molecule The smallest unit of a substance that keeps all of the physical and chemical properties of that substance; it can consist of one atom or two or more atoms bonded together.
Compound a substance made up of atoms of two or more different elements joined by chemical bonds
Mixture a combination of two or more substances taht are not chemically combined
Homogeneous describes somethign that has a uniform structure or composition throughout
heterogeneous composed of dissimilar components
What is Chemistry? Chemistry is the study of chemicals, their properties, and the reactions in which they are involved.
What are the 3 states of matter? Solid, liquid, and gas.
Mater has both --- and ---; matther thus has density, which is the rration of --- to ---. mass and volume
SI units are used in science to express ---. quantities.
---- factors are used to change a given quantity from one unit to another unti conversion
Created by: etalentino