Lead

Authors: K.Hal & J.Ros

Here is a picture of lead and some information: media type="file" key="Modern_Elemental_Theory.asf" **    Element name: Lead Symbol: Pb    ** **   Atomic #: 82 Atomic mass: 207.2 Period #:6 Group #: 14 State at room tempurature: Solid

Here is a bohr model of lead  **__:__  [|Lead]

** The History of Lead: Lead has been known since anchent times! The Romans used it to line there water pipes, and because Lead is a cumulative poision the Romans were poisioned and lead is still to some what to blam for the fall of the empire. Lead was also used by the Greek, Egyptians, Romans, and Chinese. They used it for Plumbing,Solder,Sheilding from Radiation, and Batteries. The occerance of the element Lead is extracted chefily from galena. Also Found in ore with zinc, silver, and (most abundantly) in copper. ** Lead's boiling point is: 2022 K (1749°C or 3180°F). Lead's melting point is: 600.61 K (327.46°C or 621.43°F). The atomic number is 82. The average atomic mass is: 207.2. The color is bluish. It is a metal. Lead is also a unreactive metal.
 * Physical Properties of Lead:

Lead's Ionisation Energies: ** 715.5 1456.4 3081.5 4083 6640
 * 1st: 2nd: 3rd: 4th: 5th:

The Element uses of Lead: The Health hazards of lead are numerous! They range from blood posining, to brain disorders, to uncountable effects that are all negative. This can get into the enviorment from the earth, to old paint, and chalk in one case! In nature it can be minned from the earth. It can also be found in the ores of silver, zinc, and copper. This element is no longer used because of how health factors take play in the enviorment. We obtain this by also extracting from galena.

Lead costs $0.70 per pound. So for $100.00 you would get about 143 pounds! Now that's a lot of Lead! **