Chlorine | Chemistry

Durban Girls’ College, Durban, South Africa

Chlorine: I decided to make the whole tile green-yellow as this is the colour of chlorine. The gas is seeping up from the symbol and atomic number of the element as chlorine is a gas at room temperature. The tap and glass of water signify how helpful chlorine is for water purification, while the salt shaker shows that chlorine is also found in the form of a salt with sodium. The last and biggest image, a gas mask, symbolizes how chlorine gas was used as a deadly gas in World War I, which stopped soldiers from breathing and damaged their eyes and lungs.

Original artwork by Rebecca Plumble, grade 8 student; teacher: Helen McCready, Durban Girls’ College, Durban, Kwazulu-Natal, South Africa

Atomic properties*

Name:

Chlorine

Symbol:

Cl

Atomic number:

17

Atomic mass:

35.453 amu

Melting point:

-103°C

Boiling point:

-34°C

Density:

0.003214 g/cm³

Electronegativity:

3.16

# of Isotopes:

2

State:

Gas

Colour:

Yellowish-green±

Classification:

Non-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/