1. The Periodic Table of Elements
Metals, Nonmetals, Metalloids and Noble Gases

2. Location of Metals, Nonmetals, Metalloids and Nobel Gases
Elements on the left and middle are METALS (except Hydrogen)
Elements on the right are NONMETALS
METALLOIDS form the narrow stair-step area between metals and nonmetals.
The last group (18) to the right are NOBLE GASES

3. What are Metals, Nonmetals, Metalloids and Nobel Gases?
Metals: Good conductors of heat and electrical current.
Most metals are solid at room temperature.
(Exception is Mercury – Hg which is a liquid)
Chemists classify and define an element as a metal based on its properties.

4. Physical Properties of Metals
Metals Physical Properties:
Shininess
Malleability
Ductile
Magnetism
Conductivity

5. Physical Properties of Metals
Malleability: A material that can be hammered or rolled into flat sheets and other shapes.
Ex. Copper, Aluminum, Gold

6. Physical Properties of Metals
Ductile: A material that can be pulled out or drawn into a long wire.
Ex. Copper, Aluminum

7. Physical Properties of Metals
Conductivity: The ability of an object to transfer heat or electricity to another object.
Reactivity: The ease and speed with which an element combines, or reacts, with other elements and compounds.

8. Physical Properties of Metals
Corrosion: The gradual wearing away of a metal element due to a chemical reaction.
** Remember – Reactivity of metals DECREASE as you move from LEFT to RIGHT on the periodic table **

9. Nonmetals
Nonmetal: An element that lacks most of the properties of a metal.
Most nonmetals are gases at room temperature.

10. Physical Properties of Nonmetals
Dull
Brittle
Low Density
Poor Conductors
Good Insulators

11. Physical Properties of Nonmetals
Dull: Not shiny.
Brittle: Not malleable or ductile.

12. Physical Properties of Nonmetals
Nonmetals have lower densities than metals.
Nonmetals are poor conductors of electricity and heat, therefor they are good insulators.

13. Metalloids
Metalloids: Have characteristics of both metals and nonmetals.
Metalloids are all solid at room temperature.
Metalloids boarder between metals and nonmetals.

14. Metalloids Brittle, hard and somewhat reactive
Ability to conduct electricity varies
Semiconductors: Substance that CAN conduct electricity under some conditions but NOT under other conditions.
Ex. Computer Chips, Transistors, Lasers

15. Noble Gases Noble Gases: Elements located in Group 18.
Nobel gases are unreactive and do not bond with other atoms.
All Nobel Gases have complete outer energy levels.