Halogens are highly reactive in nature. Fluorine for example is the most reactive of all elements. They have a number of important industrial and commercial applications. They have also been linked with issue of environmental concern including that of ozone depletion at high latitudes. The name for this group is in part derived from the Greek word Halos meaning salts.

Elements of the Periodic Table
Elementsort icon Atomic numbersort icon Atomic weightsort icon Boiling pointsort icon Densitysort icon Heat fusionsort icon Heat vapoursort icon Melting pointsort icon Specific heat capacitysort icon Thermal conductivitysort icon
Astatine 85 209.99 0 J/kg/K
Bromine 35 79.91 331.16° K 3120 kg/m³ 5.28 kJ/mol 14.99 kJ/mol 265.96° K
Chlorine 17 35.45 238.46° K 1560 kg/m³ 3.22 kJ/mol 10.22 kJ/mol 172.16° K
Fluorine 9 19 84.96° K 1505 kg/m³ 0.26 kJ/mol 3.16 kJ/mol 53.56° K
Iodine 53 126.9 456.16° K 4940 kg/m³ 7.83 kJ/mol 21.78 kJ/mol 386.86° K
Amazon Books
Image of Mendeleev on the Periodic Law: Selected Writings, 1869-1905
Author: Dmitri Ivanovich Mendeleev
Publisher: Dover Publications Inc. (2005)
Binding: Paperback, 320 pages