CHEMISTRY

 =Chemical reactions = =[] =

2.Write your name and the element you want to research on a post it note, and place post it on the class Periodic Table. antimony 3.Answer these questions in your oblog or notebook: a)What is the name of your element? Antimony b)What is the symbol for your element? Sb c)What is the atomic number? 51 d)What is the atomic mass? 122 e)What is your element used for? • Antimony is a fragile metal and is a poor conductor of heat and electricity. Very pure antimony is used to make certain types of semiconductor devices, such as diodes and infrared detectors. • Antimony is alloyed with lead to increase lead's durability. Antimony alloys are also used in batteries, low friction metals, type metal and cable sheathing, among other products. • Antimony compounds are used to make flame-proofing materials, paints, ceramic enamels, glass and pottery. • The ancient Egyptians used antimony, in the form of stibnite, for black eye make-up. 4.Develop 2 more questions about your element and write the questions and answers in your oblog or notebook. a) From which natural compounds is the element Sb obtained from? Antimony is found as: Antimony Sulfide (Stibmite Sb2S3) and valentinite (Sb2O3). b)What are metalloids? Metalloids are the elements that have properties of both metals and non-metals. Some of the metalloids, such as silicon and germanium, are semi-conductors. This means that they can carry an electrical charge under special conditions. This property makes metalloids useful in computers and calculators The Metalloids are: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium

5.Use at least 3 of the 5 listed websites to answer your questions. • [] [|http://www.chemicalelements.com] • [|http://www.chemicool.com] • [] [] (this site focuses on the first 18 elements 6.Answer reflection questions in your oblog or notebook. 7. a) How might understanding how to use the Periodic Table be useful? It is useful because it helps you before you even do research. Just by recognizing the elements you understand what they are, what are their properties and characteristics and why peple use it. It is also a complex mosaic that shows the similarities and the differences between various elements. This chart allows users to take the periodic table with them anywhere at any time.

b)Compare and contrast your knowledge before and after your research on your element. before: I doesn´t knew nothing about antimony after: I learn more about antimony (properties, characteristics...)