Barium | Chemistry | University of Waterloo

Lamar High School, Arlington, Texas, U.S.A.

Barium, 56, Lamar High School, Texas USA

Barium: Barium sulphate is a contrast medium for upper and lower gastro intestines, so an intestinal X-ray is the background. The lettering is in green because barium burns green in a flame test. The equation at the bottom represents how barium was used to discover a fission reaction of uranium by Meitner and Frisch.

Artwork by Melissa McNeill. Teacher: Meg Young, Lamar High School, Arlington, Texas, U.S.A.

Atomic properties*

Name:

Barium

Symbol:

Ba

Atomic number:

56

Atomic mass:

137.33 amu

Melting point:

727°C

Boiling point:

1897°C

Density:

3.62 g/cm³

Electronegativity:

0.89

# of Isotopes:

9

State:

Solid

Colour:

Silvery-white±

Classification:

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/