what are its properties ?
It has the electron configuration [Ne]3s3p, with the seven electrons in the third and outermost shell acting as its valence electrons.
Chlorine
 has the electron configuration [Ne]3s3p, with the seven electrons in the third and outermost shell acting as its valence electrons. 
who created the quantum mechanical model of the atom Michael Faraday where was he born Newington Butts who is he ? He was an English scientist. any awards in his name ? UNANSWERABLE is there any book written on him ? UNANSWERABLE talk about his later life ? In June 1832, the University of Oxford granted Faraday an honorary Doctor of Civil Law degree. talk a bit more about the degree ? It is a degree offered by some universities, such as the University of Oxford, instead of the more common Doctor of Laws (LLD) degrees. the person mentioned above what was he's contribution to chemistry ? He discovered two new compounds of chlorine and carbon, invented the Bunsen burner, discovered the laws of electrolysis and that the optical properties of gold colloids differed from those of the corresponding bulk metal etc. what is the first compound ? UNANSWERABLE
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Chlorine [SEP] Properties
Chlorine is the second halogen, being a nonmetal in group 17 of the periodic table. Its properties are thus similar to fluorine, bromine, and iodine, and are largely intermediate between those of the first two. Chlorine has the electron configuration [Ne]3s3p, with the seven electrons in the third and outermost shell acting as its valence electrons. Like all halogens, it is thus one electron short of a full octet, and is hence a strong oxidising agent, reacting with many elements in order to complete its outer shell. Corresponding to periodic trends, it is intermediate in electronegativity between fluorine and bromine (F: 3.98, Cl: 3.16, Br: 2.96, I: 2.66), and is less reactive than fluorine and more reactive than bromine.