An element is a pure
substance which cannot
be split up into two or
more simpler substances
by chemical means.
H2
Hydrogen
Elements
Note that an element:
Consists of only one kind of atom.
Cannot be broken down into a
simpler type of matter by either
physical or chemical means.
Can exist as either atoms (e.g. argon)
or molecules (e.g. nitrogen).
Examples of Elements
Is the smallest particle
of an element and has
the same chemical properties
of the element
1 Hydrogen
atom
(H)
Is made up of two or more
atoms that are chemically
bonded together
(note: these atoms are of the
SAME element!!)
1 Hydrogen
molecule
(H2)
Atoms of the element Argon
Consists of
only one kind
of atom
Microscopic view
:
of the atoms of the
element argon
(Ar) (gas phase).
Molecules of the element
Nitrogen
Consists of
only one kind
of atom
Microscopic view of
the molecules of the
element nitrogen
(gas phase).
There are
118
elements
What
a mess!
on earth!
Don’t worry, somebody
took the time to find a
pattern and organize
them!
 Let’s find out more about
the Periodic Table!
On your left side
Guided notes: Have your black
and white periodic table ready
to highlight, color, circle or
underline, when instructed!
Let’s check!-Right side
According to their
The periodic table is made up of rows
physical
_____________
and
periods
called ________________,
_____________
chemical
properties
groups or families (appearance and
and columns called _____________.
behavior), elements
are classified as
metals
______________,
nonmetals and
______________,
metalloids
___________.
Most elements are
metals they are
_________,
located on the
____________
side.
left
___________
Nonmetals are on
right
the _____________!
properties are located
similar
Elements with ___________
chemical ___________
in the same column or group!
Let’s see some properties of the
Elements!
Class discussion:
Why is it
important to know the location of elements
in the periodic table?
We have only 5
And, if I study the
chemical and physical
properties of elements
then I can learn more
about their uses and
interactions with
other materials
min to come up
with a
meaningful
answer…
The properties of an element can
be predicted from its location in the
periodic table!
On your
own
now!
What am I?
Find out my
properties and
then classify
me!
Where am I on the
periodic table?
2
Which group___
Metal?___ Nonmetal?___
Metalloid?____
What other elements are
similar to me
Sr _____
Ba
Be _____
Ca _____
____
Ra
_____
Magnesium
Where am I on the
periodic table?
Which group___
Metal?___ Nonmetal?___
Metalloid?____
What other elements are
similar to me
____ _____ _____ _____
_____
Where am I on the
periodic table?
Which group___
Metal?___ Nonmetal?___
Metalloid?____
What other elements are
similar to me
____ _____ _____ _____
_____