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Molecules & Mixtures

TermDefinition
Element A substance that cannot be broken down into any other substance by physical or chemical means. It is made of one type of atom.
Molecule A group of 2 or more atoms held together by chemical bonds
Compound A substance made of two or more elements that are chemically combined in a set ratio.
Pure Substances A single kind of matter that has a specific makeup or composition. It can't be easily separated. It can be either an element OR a compound.... just made of one type of "stuff".
Mixture Two or more substances that are together in the same place, but their atoms are NOT chemically bonded. These CAN be physically separated.
Heterogeneous A mixture in which you can see the different parts and can easily separate them out.
Homogeneous A mixture that is so evenly mixed that you can’t differentiate the parts simply by looking at the mixture.
Solution A type of mixture where one part of the mixture is dissolved in the other part.
Solvent The part of the solution that is present in the largest amount. It dissolves the other substances. *** Usually Water***
Solute The substance that is dissolved by the solvent Examples: The lemon juice & sugar in lemonade
Saturation When you have added so much of a solute that no more dissolves
Magnetic Attraction Using a magnet to pull magnetic objects out of a mixture. Ex: separating metal and sand
Filtration Pouring a mixture through a filter to separate solids from liquids. Ex: Separating sand and water
Distillation Liquids are heated until one of them boils, and turns into gas, which is moved away from the original liquid. The gas cools into the separated liquid. Ex: Separating alcohol and water
Evaporation The liquid evaporates away, leaving the solids behind. Ex: Separating salt and water
Acids React with metals and carbonates. Taste sour. Turn blue litmus paper red. Less than 7 on the pH scale.
Bases Taste Bitter. Feel Slippery. Do NOT react with metal or carbonates. Often used for cleaning. Turn red litmus paper blue. More than 7 on the pH scale.
Salts A neutral compound that can be made from the combination of an acid and a base. Are made of crystals and are ALWAYS compounds!
Created by: Stszerdy
 

 



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