ATOM
PROPERTIES OF MATTER
PROPERTIES
ELEMENTS COMPOUNDS &
MIXTURES
*They are called
the “building
blocks of
matter”.
*All Matter has
both chemical and
physical
properties
*Made up of
electrons
neutrons and
protons
*Chemical
properties can
change matter to
a new kind of
matter with
different
properties. An
example is
burning paper to
ash.
Modeling clay is
malleable. It can
be changed buts
its make-up or
identity remains
unchanged,
Therefore this is
a physical change
NOT chemical.
*Electrons have
negative charges.
They are located
outside the
nucleus.
*Neutrons are
found in the
nucleus. They
hold no charge
*Protons are also
found in the
nucleus. They
have a positive
charge.
There are about 110 elements and
92 are natural while the rest
are synthetic or man made. All
Matter in the universe is made
of elements or compounds.
An element is the simplest form
of matter. It can’t be made any
simpler and only contains one
kind of atom. Oxygen is made out
of only oxygen (O2) atoms.
Therefore it is considered pure.
Carbon is another example. Two
or more atoms combined is called
a molecule.
Compounds contain 2 or more
elements in order to form a
compound. Most elements are
found in combination. With other
elements. Table salt is an
example of a compound (NaClsodium and chlorine)
Mixtures are combinations of two
or more substances. They can
contain elements, compounds or
both in any amounts. Because the
substances are not chemically
combined in a mixture they can
be separated by physical means.
Fruit salad is an example.
Solutions are mixtures that look
like a single substance like
when salt dissolves (spreads out
evenly) in boiling water. Within
a solution, one substance is
dissolved in another substance.