Arsenic

Analytical testing dots

Arsenic is a chemical element that has the symbol As and atomic number 33. Arsenic was first written about by Albertus Magnus (Germany) in 1250. Its Atomic Mass is 74.92. Its Ionic Charge is (3-) Its position in the periodic table is shown at right. This is a notoriously poisonous metalloid that has many allotropic forms: yellow (molecular non-metallic) and several black and gray forms (metalloids) are a few that are seen. Three metalloidal forms of arsenic with different crystal structures are found free in nature (the minerals arsenic sensu stricto and the much rarer arsenolamprite and pararsenolamprite), but it is more commonly found as arsenide and arsenate compounds. Several hundred such mineral species are known. Arsenic and its compounds are used as pesticides, herbicides, insecticides and various alloys.


 

General
Atomic number:   33
Symbol:   As
Atomic weight:   74.992
Boiling Point (C):   613
Melting Point (C):   817
Density:   5.72
heatVapor:   7.75
heatFusion:   6.62
Electrical Conductivity:   0.029
Thermal Conductivity:   --
Specific Heat Capacity:   0.082

 

View the Periodic Table...

View the List of Elements...

Analytical testing dots

Content from Wikipedia for educational use and displayed with permission under the GFDL.
Please report any inaccuracies to the Webmaster.