Chlorine


 * =Chlorine=

Symbol



 * Group number and period on the periodic table

Group 17, period 3.


 * Name of the person and year it was discovered

Chlorine was discovered by Carl William Scheele in 1774.


 * State of the element at room temperature (solid, liquid or gas)

At room temperature Chlorine is in a gaseous state.


 * The colour of the element

Chlorine is a greenish yellow.


 * The atomic number and mass

The atomic number is 17, and the mass is 35.453.


 * Picture(s) of the element




 * Number of protons, neutrons and electrons

Chlorine has 17 protons, 17 electrons, and 18 neutrons.


 * Boiling and melting points (in degrees Celsius)

Chlorine enters the boiling point at -34.4, and melts at -101.5.


 * Metal/Metalloid/Non-metal

Non-metallic.


 * 5 Important uses/interesting facts and any other information you think will be interesting and/or useful to others (including common chemical compounds)

1) In concentrated amounts a few breaths of Chlorine will be fatal.

2) Chlorine is a respiratory irritant.

3) When in liqiud form, Chlorine will burn skill when in contact.

4) Chlorine is usually used as pool water disinfectant

5) The word 'chlorine' comes from the Greek word 'khloros' which means green.