Transcript ELEMENTS
ELEMENTS COBALT AND CALCIUM Cobalt Cobalt This element is called Cobalt. The atomic number is 27, and symbol for Cobalt is Co. History Cobalt was discovered by George Brandt in 1737. Brandt was trying to prove that some unknown element (Cobolt) could dye things, and not bismuth. The name “Cobolt” comes from the German word “kobalt,” which means “evil spirit.” Uses Cobalt is can be found in Zaire, Morocco, and Canada. It makes up .003% of the Earth’s crust. It is usually in minerals such as cobalite, smaltite and erythrite. It is usually used for magnets, ceramics, and special glasses. Fun Facts A type of Cobalt is Cobalt-60, which is know to cause cancer. Cobalt can be strongly magnetized. Cobalt can produce a permanent blue color in glass, porcelain, pottery, and ceramic. Cobalt is found in meat, dairy products, and in vitamin B-12. Pictures Pictures Cited Sources Bentor, Yinon. Chemical Element.com - Cobalt. Jan. 31, 2007 <http://www.chemicalelements.com/elements/co. html> Radio Chemistry. Jan. 31, 2007. <http://www.radiochemistry.org/periodictable/ele ments/27.html> Grey, Theodore. 27 Cobalt. Feb. 1, 2007 http://www.theodoregray.com/PeriodicTable/Ele ments/027/#sample6.html Calcium Calcium This element is called Calcium. Its atomic number is 20. This atomic number means that it has 20 protons in each atom. The symbol for Calcium is Ca. History Calcium was discovered by Sir Humphrey Davy in 1808. He was experimenting, and passed a mixture of lime and mercuric oxide through an electric current. That electric current passed through an electrolyte. The name “Calcium” comes from the Latin base word, “calcis,” which means “lime.” Uses Calcium is never found in nature by itself, and about 4.2% of the earth’s crust is made up of it. You can find it in chalk, limestone, and marble. It is used in fertilizer, concrete and plaster of paris. Fun Facts For our age group, we need about 1300mg of Calcium every day. If you get muscle cramps in your legs at night, your blood may be low in calcium. Fun Facts In ice cream, there is 80mg of Calcium. In cheese, there is 245mg of Calcium. In milk, there is 300mg of Calcium. Pictures Pictures Cited Sources Bentor, Yinon. Chemical Element.com - Calcium. Jan 31, 2007 <http://www.chemicalelements.com/elements/ca.html> Boothby, Barbara, E. HUHS Nutrition Services Jan 31, 2007 <http://huhs.harvard.edu/ClinicalServices/NutritionKnow How/Calcium.htm> WebElements, Jan 31, 2007 <http://www.webelements.com/webelements/elements/te xt/Ca/key.html> Created by…. Erin Strauss Kathy Au Zach Galarza