1. Reading the Periodic Table

2. A way of organizing & classifying elements
Arranged in rows and columns

3. Columns
The vertical (up and down) columns of the periodic table (there are 18) are called groups or families.
Elements in the same group or family have similar characteristics or properties.

4. Rows The horizontal rows of the periodic table are called periods.
Elements in a period are not alike in properties.
The first element in a period is usually an active solid, and the last element in a period is always an inactive gas.

5. Rows
Atomic size (number of protons) decreases from left to right across a period.
Atomic mass (number of protons) increases from left to right across a period.

6. Rows
Metals are on the left
Non-metals are on the right

10. ALKALI METALS very reactive metals that do not occur freely in nature
malleable, ductile, good conductors of heat and electricity.
softer than most other metals
can explode if they are exposed to water

11. not found free in nature
ALKLINE EARTH METALS
metals
very reactive
not found free in nature

12. TRANSITION METALS
ductile and malleable, and conduct electricity and heat
iron, cobalt, and nickel, are the only elements known to produce a magnetic field.

13. RARE EARTH ELEMENTS
many are man-made

14. are ductile and malleable
OTHER METALS
are ductile and malleable
are solid, have a relatively high density, and are opaque

15. METALLOIDS have properties of both metals and non-metals
some of the metalloids, such as silicon and germanium, are semi-conductors. This means that they can carry an electrical charge under special conditions. This property makes metalloids useful in computers and calculators

16. NON-METALS not able to conduct electricity or heat very well
very brittle, and cannot be rolled into wires or pounded into sheets
exist in two of the three states of matter at room temperature: gases (such as oxygen) and solids (such as carbon).
have no metallic luster, and do not reflect light.

17. HALOGENS
"halogen" means "salt-former" and compounds containing halogens are called "salts"
exist in all three states of matter:
Solid- Iodine, Astatine
Liquid- Bromine
Gas- Fluorine, Chlorine

18. NOBLE GASES
do not form compounds easily