3. How it started
• Scientist needed a better way to
organize the elements and their
families.
• He put all 118 elements on a table
represented by periods and groups.
4. How it is organized
• The periodic table is organized by
atomic weight,The higher the atomic
weight the farther down and to the
right it will be located on the table.
• it is also organized by periods
horizontal row and groups witch are
the vertical columns.
5. Relationships
• Elements are placed into families by
their physical and chemical properties.
• They are also classified as Non metals &
Metals.