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Definition: a pure substance of one type of atom

Characteristics:

Atomic number

State of Matter

Density

Boiling point

Appearance

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Hydrogen (H)

Oxygen (O)

Carbon (C)

Iron (Fe)

Gold (Au)

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Definition: substances made from the atoms of two or more elements

Characteristics:

Pure substance

It can not be separated by a physical method

Element loses its properties in a compound.

Its composition is fixed throughout its mass

It has a fixed melting point

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Water (H2O)

Carbon dioxide (CO2)

Glucose (C6H12O6)

Sodium Chloride (NaCl)

Ammonia (NH3)

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Definition: Two or more pure substances, each of which remains its individual properties

Characteristics:

They can be classified as either homogenous or heterogeneous

They don't have a fixed composition and can be mixed in any ratio

Mixtures are impure substances

Mixture has no fixed melting points or boiling points

The compounds of a mixture can be separated by physical means

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Sugar water

Concrete

Air

Sand and Salt

Ink