Arsenic
Jose Padilla
Periodic Table Information
- Where on the table:5A
- Family:metalloids
- Group: Pnictoge
- Atomic number: 33
- Atomic mass: 74.92160
- Symbol:As
- Number of protons:33
- Neutrons:42
- Electrons:33
Where is Arsenic found in nature?
- not found in nature as a pure element
- found mainly as a compound
- common ores include: arsenopyrite, orpiment, realgar
Uses and characteristics
- arsenic is poisonous!
- used to make rat poison
- used to make insecticides
Physical Properties
- shiny
- gray in color
- brittle
- solid
- does not melt when heated
- can also be a yellow crystalline solid if the vapors of arsenic are cooled quickly
Chemical Properties
- metalloid properties
- arsenic oxide formed when it is heated and combined with oxygen
Discovery
- Discovered by German alchemist Albertus Magnus in 1250.