Cobalt | Chemistry

Heathwood Hall Episcopal School, Columbia, South Carolina, U.S.A.

Cobalt, 27, Heathwood Hall Episcopal School, South Carolina USA

Cobalt: Ideas from chemistry students to represent the properties of cobalt were compiled, and incorporated into a beach scene, a favourite place for Columbia, SC students. A magnet for cobalt’s ferromagnetic property, and colors — blues, reds, pinks, green and purplish blue — were used to represent the many shades of cobalt-based pigments or halide compounds. A goblin sits mischievously atop the atomic number since cobalt was named for the Kobold, a goblin sprite from German folklore. Additionally, a boat cruises through the waves, as cobalt boats are a favourite watercraft among the students.

Sondra F. Wieland and The Junior Class, Heathwood Hall Episcopal School, Columbia, South Carolina, U.S.A.

Atomic properties*

Name:

Cobalt

Symbol:

Co

Atomic number:

27

Atomic mass:

58.9332 amu

Melting point:

1495°C

Boiling point:

2927°C

Density:

8.9 g/cm³

Electronegativity:

1.88

# of Isotopes:

4

State:

Solid

Colour:

Lustrous, metallic-greyish-tinge±

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/