Mixtures & ….

HETEROGENOUS
A mixture in which different parts can be easily distinguished.
Pizza, tossed salad, Chex Mix….
SOLUTION
A homoggeneous mixture containing particles so tiny that they can not be seen with a microscope.
Sugar and/or salt water.
SUSPENSION
A hetroeneous mixture containing a liuqid in which larger particles eventually settle out.
Snow globe, Italian dressing…
Reactants are Changed into the Products
chemical change
HOMOGENOUS
A mixxture in which different materials are blended evenly so that the mixture is the same throughout; also called a solutio.
Sugar water, air, milk….
COMPOUND
A Substance made of chemicaly combined atoms of two or more elements.
Water (H2O), Salt (NaCl)….
PRECIPITATE
An insoluble compound formed during a double-displacement reaction.
A compound that “falls out” of a solution during a chemcial reaction.
SOLUBILITY
The amount of a substance that will dissolve in a solvent. Generally will increase with an increase in temp.
A physical property of sugar is it is soluble in water.
ELEMENT
A substance in which all the atoms in a sample are alie. They have the same number of protons.
Lewis Dot Diagrams
Dots placed around the symbol for elements showing how many valance elecrons the element has in the outer shell.
CHEMICAL FORMULA
A percise tatement that tells whic elments are in a compound and their ratio. NaCl = a 1:1 ratio, H2O = a 2:1 ratio.
CHEMICAL CHANGE
A change in which one or more substances are converted to differetn substances.
COLLOID
A heteroeneous mixtre containing tiny particles that never settle out.
Cool Whip, Jell-O, milk…
FALMABILITY
A chemcial charateristic of a substance that allows it to oxidize rapidly, also called buring.
Hydrogen is flamabe.
SOLVENT
The substance that dissolve a solute.
Water is the universal solent.
PHYSICAL CHANGE
A change in the size, shape, color or state of matter.
Expands when heated, wadded up paper, paint a wall and/or ice melting.
SOLUTE
The substance being disolved in a solvent.
Sugar is the solute, water is the solvent.
MIXTURE
A material made of elements orcompounds stirred together but NOT combined chemicall.
Chex Mix, sugar water,air.
CHEMICAL FORMULA
A precsie staement that tells which elements are in a coupound and their ratios
MOLECULE
A chemcial combination of 2 or more elements that are the same. H2 and O2
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