Greenhills School, Ann Arbor, Michigan, U.S.A.
Bohrium: The tile design for bohrium is a combination of two designs submitted by the students in the Advanced Chemistry class, with the key design elements proposed by 11th grade student, Alex Wozniak. The radioactive symbol overlays a model of the atom, developed by Niels Bohr. The elephant, the motto, and the central shield with the yin and yang symbol, are from the coat of arms that Bohr designed after being awarded the Order of the Elephant by the Danish government in 1947. The Latin motto contraria sunt complementa translates to opposites are complementary.
Cathy Renaud, Greenhills School, Ann Arbor, Michigan, U.S.A.
Number of isotopes:
* 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/