2.  It comes from environmental causes.  Contaminated air, food, and water can all be the source of Arsenic Ingestion.  It is very brittle and crystalline; arsenic sublimates (changes directly from a solid to a gas) when heated.

3.  The atomic number is 33 and the atomic mass is 74.9216  Numbers of protons/electrons is 33  The element group is the nitrogen Group  Number Neutrons are 42  Boiling point is 603.0 Celsius and the melting point is 817 Celsius.  Common isotopes are As-75  Density is 5.72 g/cm3  Most abundant physical state: Solid (Metalloid solid)  The symbol is AS

4.  Arsenic is released into the air by volcanoes and is a natural contaminant of some deep-water wells.  The toxicity of an arsenic-containing compound depends on its valence state, and the physical aspects governing its absorption and elimination.  Arsenic accumulates in the liver, spleen, kidneys, lungs, and gastrointestinal tract.

8.  Odor of element is garlic.  No one knows when Arsenic was discovered and they leave it to the ancients.  Arsenic have been used to make rat poison and some insecticides.  Gallium arsenide (GaAs) can produce laser light directly from electricity.

9.  also known as Saint Albert the Great and Albert of Cologne, was a Dominican friar and bishop who achieved fame for his comprehensive knowledge of and advocacy for the peaceful coexistence of Science and religion.  They leave it to the ancients because it was made along time ago.

10.  # of valence Electrons: 4s2p3  Electron configuration: 1s 2 2s 2 p 6 3s 2 p 6 d 10 4s 2 p 3  Element group: Pnictogen  Element period: 4

11.  Arsenic get its name from a word for the yellow pigment now known as orpiment.  The element naturally occur on the earth’s surface

12.  Common uses of element is textile fabrics, wallpaper, and poisons  Arsenic is neither a metal or an nonmetal so thy call it metalloids.  It costs $320 per 100 g.

13. “Arsenic” http://mysite.du.edu/~jcalvert/phys/arsenic.htm#Uses web. February 27, 2009 http://mysite.du.edu/~jcalvert/phys/arsenic.htm#Uses Jefferson Lab http://education.jlab.org/itselemental/ele033.htmlweb feb.http://education.jlab.org/itselemental/ele033.htmlweb The mineral native arsenic http://www.galleries.com/minerals/elements/arsenic/arsenic.htm 1995-2010 http://www.galleries.com/minerals/elements/arsenic/arsenic.htm