1. Periodic Trends
Electronegativity increases from the left to the right, and from the bottom to the top
Atomic radius increases from the right to left, and from the top to the bottom

3. Periodic Trends

6. Properties of Metals
Metals are good conductors of heat and electricity, shiny, ductile (made into wire), malleable (made into sheets).

7. Properties of Non-Metals
Non-metals are poor conductors of heat and electricity, not ductile or malleable, dull, and many are gases.
Solid non-metals are brittle and break easily.
Sulfur

8. Properties of Metalloids
Metalloids (metal-like) have properties of both metals and non-metals.
They are solids that can be shiny or dull.
They conduct heat and electricity better than non-metals but not as well as metals.
They are ductile and malleable.
Silicon

10. Alkali Metals
The alkali family is found in the first column of the periodic table.
Atoms of the alkali metals have 1 valence electron.
They are the most reactive metals.

11. Alkaline Earth Metals They are never found uncombined in nature.
They are the 2nd column therefore having two valence electrons.

12. Transition Metals
Transition Elements include those elements in the B families.
They are good conductors of heat and electricity.

13. Halogen Family
Halogens are in the 17th column and therefore have 7 valence electrons, which explains why they are the most active non-metals.
Halogen atoms only need to gain 1 electron to fill their outermost energy level.

14. Noble Gases
Noble Gases are colorless gases that are extremely un-reactive as their outer shell is full.

15. Rare Earth Elements
The thirty rare earth elements are composed of the lanthanide and actinide series.
Many are man-made.