Transcript Describe the Periodic Table

Describe the Periodic Table
0The periodic table is a chemistry
reference
0It arranges all the known elements in an
informative grid
Describe the Periodic Table
0Elements are arranged left to right
and top to bottom in order of
increasing atomic number
0This order usually coincides with
increasing atomic mass
Describe the Periodic Table
0The Table's pattern and arrangement
shows the arrangement of electrons in
the atom.
0Elements have different atomic
numbers - the number of protons or
electrons increases up the table as
electrons fill the shells.
Describe the Periodic Table
Elements have different atomic masses - the
number of protons plus neutrons increases
up the table.
0 Rows - elements of each row have the same
number of energy levels (shells).
0 Columns - elements have the same number
of electrons in the outermost energy level or
shell (one to eight).
Describe the Periodic Table
0The different rows of elements are
called periods.
0 The period number of an element
signifies the highest energy level an
electron in that element occupies
0The different columns of elements
are called groups or families
0 Elements in the same family have
similar properties
Describe the Periodic Table
Describe How To Read
The Periodic Table
Describe how to read the periodic
table:
0 Every table has:
Describe how to read the periodic
table:
Atomic Number
0 The number of protons in an atom
identifies the element.
0The number of protons in an atom
is referred to as the atomic number
of that element.
Describe how to read the periodic
table:
Atomic Symbol:
0The atomic symbol is one or two letters
chosen to represent an element ("H" for
"hydrogen," etc.).
0 These symbols are used every where in
the world
0 Usually, a symbol is the abbreviation of
the element or the abbreviated Latin
name of the element.
Describe how to read the periodic
table:
Atomic Mass:
0The atomic mass is the average mass of
an element in atomic mass units ("amu").
0 Though individual atoms always have a
whole number of amus, the atomic mass
on the periodic table is shown as a
decimal number 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.
Review the Periodic Table with
The Periodic Table Adventure: