20100913



=PreTest= You may use the periodic Table of the Elements. Feel free to discuss your answers with your neighbor. Be sure to assess your "confidence level" for each question; 5=very confident, 1=not at all confident.
 * Introduction:
 * Scientists have identified more than 100 different elements, which are organized into a "Periodic Table." This table often shows the atomic number and the atomic mass of each element, as well as its name and symbol. The columns are organized to show elements with similar properties. For example, carbon and silicon are in the same vertical column, so if carbon and oxygen react to make CO 2 (carbon dioxide), then it should be no surprise that silicon and oxygen also react to make SiO 2 (silicon dioxide, or sand).
 * Directions:
 * Use the Periodic Table to answer the following questions.


 * 1. What is the chemical symbol of the element Cobalt?
 * A. C
 * B. Co
 * C. Cu
 * D. Au
 * 2. What element has the atomic number 92?
 * A. Niobium
 * B. Chlorine
 * C. Argon
 * D. Uranium
 * 3. What is the atomic number of the element Radon?
 * A. 37
 * B. 86
 * C. 88
 * D. 222
 * 4. Which element has the symbol Fe?
 * A. Fermium
 * B. Fluorine
 * C. Iron
 * D. Francium
 * 5. Name four elements with chemical properties similar to chlorine, and explain how you identified those four elements.

=Diversity of Elements= There are many ways to demonstrate the amazing diversity of elements in our world, but the song by Tom Lehrer is my favorite. The two links below show two great animations accompanying this great song. =Unity of Elements= The animation below shows something that can be missed when you look at the common periodic table: the unity of elements.