Arsenic | Chemistry

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

Arsenic, 33, Canton High School, Massachussets USA

Arsenic: 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/