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Review and Practice on Classification of
Review of Types of Matter
- A pure substance has a constant, defined composition
and cannot be separated into simpler substances by physical means.
There are two types of pure substances, elements and compounds.
- Elements are pure substances that are made of only
one type of atom. The periodic table is a table containing all
- Compounds are pure substances that are made of more
than one type of atom, and can be decomposed or broken down into
its elements by chemical means.
- A mixture is composed of more than one element and / or
compound. Different mixtures of the same substances can have
different compositions (i.e., a mixture of water and sodium
chloride may be 80% water and 20% sodium chloride, or 20% water
and 80% sodium chloride.) There are two types of mixtures,
homogeneous and heterogeneous.
- A homogeneous mixture has the same composition of
elements and / or compounds throughout. If you observed a
homogeneous mixture under a microscope, you would see that the
particles of various components are evenly distributed. A
homogeneous mixture is also called a solution.
- A heterogeneous mixture has different regions or
areas with different compositions and properties. The substances
in a heterogeneous mixtures are not evenly
Practice on Identifying Types of
Is mercury an element, compound, or mixture?
Is table salt, sodium chloride, an element,
compound, or mixture?
Is (pure) water an element or compound?
What type of mixture is coffee?
What type of mixture is household vinegar?
What type of mixture is air?
Tap water is a(n)
Fourteen carat gold is a(n)
Carbon dioxide is a(n)
Vegetable soup is a(n)
The ocean is a(n)?
Iron is a(n)
Concrete is a(n)?
Wood is an?
and Physical Properties