Atomic mass, symbol and atomic number
chlorine is a naturally occurring element with the element symbol Cl and the atomic number 17. In the periodic table it stands with an atomic mass of 35.45 u in the 7th main group. The chemical element discovered by Humphry Davy in 1808 is not radioactive and is in a gaseous state at room temperature.
|Year of discovery:||1808|
|Atomic mass:||35.45 u|
|Atomic radius:||100 pm|
|Covalent radius:||102 pm|
|Van der Waals radius:||175 pm|
|Electron configuration:||Ne 3s2 3p5|
|ionization:||1251.2 kJ / mol|
|molar volume:||17,39 · 10-6 m3/ mol|
|Melting point:||-101 ° C|
|Boiling point:||-34 ° C|
|Heat of fusion:||3.2 kJ / mol|
|Heat of vaporization:||20.4 k / mol|
|Thermal conductivity:||0.008 W|
Did you know that ...
- Chlorine has a yellow-greenish color?
- Chlorine gas was used in the First World War as a chemical warfare agent?
- much of the earth's chlorine is bound in the oceans as sodium chloride (NaCl)?
- that the supposed smell of chlorine in swimming pools does not come from the chlorine itself, but because it makes a connection with the molecules from the urine?
- Carl Wilhelm Scheele received chlorine by the chemical reaction of hydrochloric acid and manganese oxide in 1774?