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Canton High School, Canton, Massachusetts, U.S.A.

Arsenic, 33, Canton High School, Massachussets USAArsenic: For my tile, I discovered that arsenic can be used as a deadly poison, commonly found in rodent poisons. I used a skull in my tile to represent arsenic’s poisonous qualities, and added the atomic number (33), the symbol (As), and atomic mass (74.922). I was surprised to learn recently of some bacteria use arsenic in their internal structure.

Artwork by Michaela Mellen, Dick Moran, Canton High School, Canton, Massachusetts, U.S.A.

Atomic properties*

Name:
Arsenic
Symbol:
As
Atomic number:
33
Atomic mass:
74.9216 amu
Melting point:
817°C (under pressure)
Boiling point:
616°C
Density:
5.73 g/cm3
Electronegativity:
2.18
# of Isotopes:
1
State:
Solid
Colour:
Metallic-grey±
Classification:
Semi-metallic±
 

* Haynes, W. M. (2011). CRC Handbook of Chemistry and Physics, 91st edition: http://www.hbcponline.com/ Retrieved April 7, 2011

± Winter, M. (2010). Home of the Periodic Table. Retrieved April 8, 2011, from Web Elements: http://www.webelements.com/