5.2 – Chemistry

states of matter
The three states in which matter can
usually be found are solid, liquid, and gas
solid
Solid matter can be picked up and carried around without being in a
special container.
Ex:rock
liquid
Liquids flow to the lowest level and can be poured. They must be in
containers to be moved or stored. Liquids take the shape of the container they are in.
Ex:water
gas
Gases take both the volume and shape of any container they are placed in. If a gas is not in a container, it will spread out indefinitely
Ex:helium
melting point(of a subtance)
the temperature at which the substance changes from a solid to a liquid.
boiling point(of a subtance)
the temperature at which a liquid rapidly changes to a gas.
Malleability
Metals that can be beaten into thin sheets are considered to be malleable.
Ductility
Some metals are ductile, meaning they can be “drawn” into wires.
Solubility
The degree to which a substance will dissolve in a given amount of another
substance, usually water, is called solubility.
Conductivity
The ability of a material to conduct electricity or heat is called conductivity.
Density
Definition: Density is the mass per unit volume of a substance.
formula:density = mass/volume
Chemical Properties
A chemical property describes the behaviour of a substance as it changes into a new substance.
Physical Properties
The physical properties of matter are those you can observe with your senses,
measure, or calculate.
Flammability
Flammability is the rapid reaction of some substances with oxygen, resulting in the release of a great deal of energy.
Corrosion
Corrosion is the slow reaction of certain metals with oxygen to form
metal oxides.
This process is calledoxidation.
Reactions with Acid
Some minerals, such as limestone, react with acid to form carbon dioxide gas.

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