1. The Periodic Table
Metals, Metalloids, and Nonmetals

3. Location of Major Categories
1. Metals : Left of the Staircase 2. Non-Metals : Right of the Staircase (Except Hydrogen) 3. Metalloids : The Staircase Elements

4. * Group 1 are the Most REACTIVE metals
* Transition Metals Group 3 - Group 12
Physical Properties
Chemical Properties
Conductors (Heat &Electricity)
Luster (Shiny)
Malleable (rolled or flattened)
Ductile (pulled in a wire)
Solids at Room Temp
*Except Mercury (Hg)
Metals Corrode
Corrosion: deterioration of metals due to a chemical reaction with environment
Ex. Iron & Oxygen = Rust

5. Nonmetals Group 17 most Reactive Nonmetals (the Halogens)
Group 18 least Reactive (the Nobel Gases)
Life on Earth Depends on Nonmetals (H,C,N,O)
Physical Properties
Chemical Properties
Poor Conductors
Dull (not shiny)
Brittle (Break easily)
4. Mostly Gases, few Solids
*Except Bromine is a Liquid
Gain Electrons easily
due to location in the higher groups

6. Metalloids Contain some properties of both metals and nonmetals
All Solids at room temperature
Metalloids are Semiconductors
(only conduct heat & electricity under certain conditions)