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SCHS Chapter 3

Glencoe Chemistry Chp 3

CHEMICAL CHANGE involves one or more substances changing into new substances...log burns to ash and cannot be made back into a log
CHEMICAL PROPERTY the ability of a substance to combine with or change into one or more other substances
CHROMATOGRAPHY is a technique that separates the components of a mixture on the basis of the tendency to each to travel or be drawn across the surface of another material.
COMPOUND is a combination of two or more different elements that are combined chemically. (make cake)
CRYSTALLIZATION is a separation technique that results in the formation of pure solid particles of substance from a solution contains the dissolved substances (making rock candy)
DISTILLATION is a separation technique that is based indifference's in the boiling points of the substances involved.
ELEMENT is a pure substance that cannot be separated into simpler substances by physical or chemical means. (91 occurs naturally)other made by scientists.
EXTENSIVE PROPERTIES are dependent upon the amount of substance present (mass)
FILTRATION is a technique that uses a a porous barrier to separate a solid from a liquid....like coffee grounds + water + a filter= coffee
GAS is a form of matter that flows to conform to the shape of its container and fills the entire volume of its container
HETEROGENEOUS MIXTURE is one that does not blend smoothly throughout and in which individual substances remain distinct. Sand + water
HOMOGENEOUS MIXTURE has a constant composition throughout ...it has a sing phase...Salt water,lemonade....
INTENSIVE PROPERTIES are independent of amount of substance present (density at a constant temperature or pressure)
LAW OF CONSERVATION OF MASS states that mass is neither created nor destroyed during a chemical reaction (change) it is conserved... Mass of reactants = Mass of products
LAW OF DEFINITE PROPORTIONS regardless of the amount a compound is always composed of the same elements in the same proportion by mass.
LAW OF MULTIPLE PROPORTIONS states that when different compounds are formed by a combination of the same elements different masses of one element combine with the same relative mass of the element in a ration of small whole numbers
LIQUID is a forma of matter that flows has a constant volume and takes the shape of its container
MIXTURE is a combination of two or more pure substances in which each pure substance retains it individual chemical properties...Mixture of salt+iron+sand can be separated to salt, iron, sand
PERCENT BY MASS The mass of the compound is = to the sum of the masses of elements that up the compound. % by mass=mass of element/mass of compound all times 100
PERIODIC TABLE Mendeleev organization table the first version of organizing the elements groups/families and rows/ periods.
PHYSICAL CHANGES alter a substances without changing its composition...example paper is paper cut or not cut
PHYSICAL PROPERTY is a characteristic that can be observed or measured without changing the composition
SOLID is a form of matter that has its own definite shape and volume
SOLUTION homogeneous mixtures lemonade, cough medicine many contain solid, liquid,or gases
STATES OF MATTER matters physical form...solid, liquid, gas, or plasma
SUBSTANCE matter that has a uniform and unchanging composition (pure substance)
VAPOR the gaseous state of a substance that is a solid or a liquid at room temperature.
Created by: gayledains