Corey+Cowitch

 ** Lead & Such ** **  Atomic #: 82 **

 ** Mass #: 207 **  ** Group #: 14 **  ** No group name **  ** Period #: 6 **

** Lead is the last element in the periodic table that is not considered to be radioactive. Lead is in group number 14 which includes the elements Carbon, Silicon, Germanium, and tin as well as lead. Lead has 4 valence electrons and is the last stable element in the periodic table. **

** Some common uses of lead are in batteries and food cans. Lead used to be used widely in pencils. Today however, it has been replaced with graphite. Lead is still used greatly today as a radiation shield. ** ** Lead & Such is the best place to purchase this element. You can buy the lead as a raw material or as a pre-made lead vest. Our lead vests are the most protective in the industry in preventing radiation. ** ** Because of the largeness of the lead atoms and the close spacing of the atoms, combined with the low cost, lead is and ideal radiation shield. So come on down to Lead & Such and purchase the best lead in the business. ** 

1. Login to www.mywebspiration.com and open the "Classification of Matter" file 2. Complete the activity using the directions found when you open the file.
 * **ASSIGNMENT 2: Classification of Matter Flowchart**
 * 3. Find a method for posting the completed concept map as a new assignment at the top of your wiki page (Note: there is more than one way to do this depending on the computer you are working on) **

In this section, we are currently learning about chemical and physical changes and their properties. A big part of this learning period is to find out which is which when identifying whether a chemical or physical change occurs. These changes happen all the time in our everyday lives and most of them we don't even know are taking place. Without these changes, we would have a tough time surviving. The most vital supply we need to survive is water, which is a chemical change of two hydrogen atoms combining with one oxygen atom.
 * Assignment 1: Physical and Chemical Properties and Changes **

Physical Property - Any property used to characterize matter and energy and their interactions. Chemical Property - A property used to characterize materials in reactions that change their identity. Physical Change - A change from one state to another without a change in its chemical composition. Chemical Change - Any process determined by the atomic and molecular composition and structure with the substances involved.