Download The Periodic Table

The Periodic Table
Describe the Periodic Table
• The periodic table is a chemistry
reference
• It arranges all the known elements in
a grid
Describe the Periodic Table
• Elements are arranged left to right
and top to bottom in order of
increasing atomic number
• This order goes along with increasing
atomic mass
Describe the Periodic Table
Elements have different atomic masses - the
number of protons plus neutrons increases
up the table.
• Rows - elements of each row have the
same number of energy levels (shells).
• Columns - elements have the same
number of electrons in the outermost
energy level or shell.
Describe the Periodic Table
• The different rows of elements are called
periods.
– Tell you the number of energy levels
(ex:
Period 3 has 3 energy levels)
• The different columns of elements are called
groups or families
– Elements in the same family have similar
properties and the same number of electrons
in its outer energy level (column 1 has 1
electron in its outer level)
Describe the Periodic Table
Valence Electron
These are the electrons in the outermost
energy level.
They are important because these electrons
determine how an element will react.
Describe How To Read The
Periodic Table
Describe how to read the periodic
table:
• Every table has:
Describe how to read the periodic
table:
Atomic Number
The number of protons in an atom identifies
the element.
Describe how to read the periodic
table:
Atomic Symbol:
The atomic symbol is one or two
letters chosen to represent an element
("H" for "hydrogen," etc.).
These symbols are used every where in the
world.
The symbol is the abbreviation of the element
or its Latin name of the element.
Describe how to read the periodic
table:
Atomic Mass:
The atomic mass is the average mass of an
element in atomic mass units ("amu").
Though individual atoms always have a whole
number of 1 amu, the atomic mass is shown as
a decimal number
That’s because it is an average of all the
isotopes of an element.
Click the link below for an
interactive and informative
periodic table.
http://www.chemicalelements.com/
Click the link below for an
amazing pictorial periodic table.
http://www.chemsoc.org/viseleme
nts/pages/periodic_table.html
Review the Periodic Table with
The Periodic Table Adventure:
http://web.buddyproject.org/web017/web017/