2. Metals

3. Classified by: Physical Properties
Good Conductors
Some are magnetic
High melting point
Solid at room temp
Hardness
Shininess
Malleability
Ductility

4. wide range of Chemical Properties
Reactive (ex: Na)
Unreactive (ex: Au & Cr)
Inbetween (Fe rusts)
Less reactive as you move L to R
Corrode= process of metal reacting & wearing away

5. Alloys
Mixture of metals consisting of 2 or more substances, but not chemically combined
Useful to combine the best properties into a single substance
Examples Cu + Sn = bronze Cu + Zn = brass Fe + C + Cr + V= stainless steel

6. Important Alkali Metals
Alkali Metals (Group 1)
Most reactive
Never found uncombined in nature
Very soft & shiny
Important Alkali Metals
Na- sea water & salt beds
K & Na- needed for muscle & nerve functions
Li- compound used in behavior drugs

7. Alkaline Earth Metals (Group 2)
2 Most Common AEM’s Mg
Old camera flash bulbs
In light weight alloy with Al (planes & ladders) Ca
bones
Not as reactive as group 1
Never found alone in nature
Fairly hard
Bright white
Good conductors

8. Transition Metals (Groups 3-12)
So similar to each other that difference between nearby columns is hard to detect
Fairly stable
Hard
Shiny
Good conductors
Ex: Fe, Cu, Ni

9. Lanthanides some say rare-earth and some say inner-transition elements
can be found naturally on Earth
Only one element in the series is radioactive

10. Actinides all radioactive and some are not found in nature
Some of the elements with higher atomic numbers have only been made in labs