Answer:- Iodine is a chemical substance which is found in the earth’s crust. It belongs to a group of elements known as non-metals. Iodine belongs to the group of elements known as halogens and is placed in group 17th of the periodic table. Iodine belongs to period 5 in the periodic table. The atomic number of iodine is 53.
The colour of iodine in its natural state is shiny violet black. It has a semi-lustrous appearance. Since iodine belongs to the group of halogens, it reacts with other elements readily. This is a generally reactive group. This is a stable element in the group of halogens.