The Complexities of Bench-Top Fabrication of Hierarchically Structured Materials

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

Barium, 56, Lamar High School, Texas USABarium: 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:

Symbol:

Atomic number:

Atomic mass:

Melting point:

Boiling point:

Density:

Electronegativity:

Number of isotopes:

State:

Colour:

Classification:

Barium

Ba

56

137.33 amu

727°C

1897°C

3.62 g/cm3

0.89

9

Solid

Silvery-white±

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/