Special+properties+of+metalloids

Chris Olivo

__**Objective**__ 15.Predict the physical and chemical properties of an element based only on its location in the periodic table.

**__Vocabulary__**
 * **Metalloids**
 * **Loustrous**
 * **Malleable**
 * **Doping Agent**

__ **So What is a Metalloid** __ A metalloid is a chemical element with properties intermediate between those of typical metals and nonmetals. Metalloids are lustrous (Shiny) and malleable (able to bend and shape without breaking) like a metal, but are also only semiconductors like a nonmetal. There are some arguments in the scientific community about which elements are metalloids and which aren't, the only thing the seem to agree on is that all the metalloids are bordering the staristep latter, but the question is which ones. However no matter what book you look at you will always find that silicon, germanium, arsenic, antimony, and tellurium; are deffinaltly metalloids. (Ball, David W.)

**__SILICON__** Silicon is the 2nd most commonly found element in componds of the world. Silicon is a very important element that is used for things that we use everyday in our live without even knowing it. Silicon can be found in glass, sand, rust preventives, fabric softeners, hair sprays, hand creams, automobile polishes, paints, adhesives, and even gum. (Rose, Emily Jane.) []

**__Germanium__** Germanium is principally used as a doping agent (an impurity added to a pure substance to produce a deliberate change) in making transistor elements. (Davis, Raymond E.) []

Arsenic is a deadly poison, and prolonged low-dose exposure to arsenic causes cancer in human beings. Many rat poisons, insecticides, and weedkillers contain arsenic. It is also used to manufacture lead gun shot and certain types of electrical equipment, and to increase the strength of certain alloys. (Busch, Marianna A.) **__​__** **__Work Cited__** "World Book." Web. 13 Nov. 2009. []
 * __ Arsenic __**