Transcript Periodic Table

Periodic Table
December 18, 2007
Mendeleev
came up with
the first
periodic
table. It was
based on the
atomic
masses,
instead of
atomic
numbers.
Nobel Gases Will Always Have Full Outer Shells
GROUPS
ALWAYS GO
UP AND
DOWN
PERIODS GO
LEFT AND
RIGHT
AS YOU GO ACCOSS
GROUPS, YOU ADD
ELECTRONS IN THE SAME
ELECTRON SHELL.
AS YOU GO DOWN
THE PERIODS, YOU
ADD SHELLS OF
ELECTRONS TO THE
ATOM.
Metals are on the left and bottom of the chart.
Nonmetals are on the right of the
chart.
Metalloids are where the two meet.
Nobel Gases are on the end, with filled shells.
The only reason these are down here, is so the
table does not get too long to fit in a book, or on
a wall.