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43 Cards in this Set

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What is an element?
An element is a purse substance that cannot be separated into simpler subtances by physical or chemical means.
What is a pure substance?
A substance in which there is only one type of particle.
Cobalt
Conducts electric current and thermal energy. Unreactive with oxygen in the air.
Iron
Conducts electric current and thermal enery. Combines slowly with oxygen in the air to form rust.
Nickel
Conducts electric current and thermal energy. Unreactive with oxygen in the air.
Elements are divided into what three categories?
Metals, nonmetals and metalloids.
Metals
Elements that are shiny and are good conductors of thermal energy and electric current.
Nonmetals
Elements that are dull (not shiny) and that are poor conductors of thermal energy and electric current.
Metalloids
Also called semiconductors, they are elements that have properties of both metals and nonmetals. Some are shiny, some are dull.
Compound
A purse substance composed of two or more elements that are chemically combined.
Table Salt
sodium and chlorine
Water
Hydrogen and oxygen
Sugar
Carbon, hydrogen and oxygen
Carbon dioxide
carbon and oxygen
Baking Soda
sodium, hydrogen, carbon and oxygen
Sodium
A soft, silvery white metal that reacts violenty with water.
Chlorine
Poisonous, greenish yellow gas.
Sodium Chloride
Table salt, is a white solid that dissolves easily in water and is safe to eat.
Mixture
A combination of two or more substances that are not chemically combined.
Distillation
Process that seperates a mixture based on the boiling points of the components.
Magnet
Can be used to separate a mixture of the elements iron and aluminum.
Contrifuge
A machine that separates the components of blood.
Mixtures vs. Compounds

Components are elements, compounds or both.
Mixtures
Mixtures vs. Compounds

Components keep their original properties?
Mixtures
Mixtures vs. Compounds

Separated by physical means
Mixtures
Mixtures vs. Compounds

Formed using any ratio of components.
Mixtures
Mixtures vs. Compounds

Components are elements.
Compounds.
Mixtures vs. Compounds

Components lose their original properties.
Compounds
Mixtures vs. Compounds
Separated by chemical means.
Mixtures vs. Compounds
Formed using a set mass ratio of components.
Solution
A mixture that apperas to be a single substance but is composed of particles of two or more substances that are distributed evently amongst each other.
Solute
The substance that is dissolved.
Solvent
The substance in which the solute is dissolved.
Different States in Solutions

Gas in gas
Dry air (oxygen in nitrogen)
Different States in Solutions

Gas in liquid
Soft drinks (carbon dioxide in water)
Different States in Solutions

Liquid in liquid
Antifreeze (alcohol in water)
Different States in Solutions

Solid in liquid
Salt water (salt in water)
Different States in Solutions

Solid in solid
Brass (zinc in copper)
Concentration
A measure of the amount of solute dissolved in a solvent.
Solubility
The amount of solute need to make a saturated solution using a given amount of solvent at a certain temperature.
Three methods used to make a solute dissolve faster.
Mixing, heating and crushing
Suspension
A mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out.
Colloid
A mixture in which the particles are dispersed throughout but are not heavy enough to settle out.