1. 1. Elements in the same row belong to the
same
.
period
2. Elements in the same column are
group
members of the same
.
3. Elements that have many similar
group .
properties belong to the same
4. Generally, the atomic mass of elements
as
increases you move from left to right and
from top to bottom on the Periodic Table.

3. Soft
Silvery solid
metalloid
72
Reacts very
slowly with
oxygen

4. Review
•
•
•
•
Periodic table
Groups
18
Elements in each group have similar
properties
• Periods
• 7 periods

5. SCIENTIST DIVIDE ALL ELEMENTS
INTO THREE SECTIONS

6. METALS
SOLID AT ROOM TEMPERATURE

Except mercury
HAVE A SILVER-GRAY COLOR

Except gold and copper
GOOD CONDUCTORS OF HEAT AND
ELECTRICITY
HAVE A METALLIC LUSTER
MALLEABLE

8. NONMETALS
FOUND IN ALL STATES OF MATTER
COME IN MANY COLORS
POOR CONDUCTORS OF HEAT AND ELECTRICITY
(INSULATORS)
NO METALLIC LUSTER
NOT MALLEABLE
SOME HAVE STRONG ODORS

10. METALLOIDS
HAVE PROPERTIES OF BOTH METALS
AND NONMETALS
SOME ARE CALLED SEMICONDUCTORS