Elements, Compound
and Mixtures
“Indivisible”
Dalton’s Atomic Model
Anything that have mass and volume.
Everything is made up of atoms
Atoms of the same element are always the same.
Atoms cannot be created or destroyed
Mixture and Compound
What are the different ways of
separating mixtures?
Magnetism
Filtration
Evaporation
Chromatography
Distillation
Magnetism
If one component of the mixture has magnetic properties, you could use a
magnet to separate the mixture. Iron, nickel, and cobalt are all materials
that are magnetic.
Not all metals are magnetic: gold, silver, and aluminum are examples of
metals that are not magnetic.
Example of magnetism
Using a magnet to separate nails from wood chips.
Filtration
Used when separating a solid substance from a fluid (a liquid or a gas) by
passing a mixture through a porous material such as a type of filter.
Works by letting the fluid pass through but not the solid.
Examples of filters: coffee filter, cloth, oil filter, even sand!
Example of filtration:
Using a coffee filter to separate the coffee flavor from the coffee beans.
Evaporation
Allowing the liquid to
evaporate, leaving the soluble
solid behind.
Example: heating sugar water.
The water evaporates and the
sugar crystals are left behind.
Chromatography
Used to separate dissolved substances in a solution from each other.
Stationary Phase
Separatio
n
Mobile Phase
Mixture
Componen
ts
Example of chromatography:
Using chromatography paper to separate ink into it’s original components.
Distillation
Separation of liquid mixture by
using the difference in boiling
point. Eg Water and Ethanol
The Periodic Table
Electrolysis
Process by which an electric current is passed
through a substance to cause a chemical
change.
The chemical change is one in which the
substance loses or gains an electron.
Diagram of Electrolysis
Electrolysis of Copper Chloride
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Electrolysis of Water
Water
is split with electricity to produce
hydrogen gas and oxygen gas.
Electrolysis of Water
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