The Periodic Table

Octet Rule

Octet Rule

________- atoms with 8 outer electrons are stable.

Oxidation numbers

________- apparent changes elements have when they react

Law of Octaves

________- seven groups of 7

Newlands (1863)

arranged by increasing atomic number

Law of Octaves

seven groups of 7

Mendelev (1865)

First periodic table

Mosely (1913)

arranged by increasing atomic number

Period/Series

horizontal rows

Group/Family

vertical columns

1A to 8A

Representative Elements

Cr

Chromium

Mo

Molybdenum

W

Tungsten

Cu

Copper

Ag

Silver

Au

Gold

Octet Rule

atoms with 8 outer electrons are stable

oxidation numbers

apparent changes elements have when they react