Two properties of Iodine are:
1) Iodine is located in group VIIA of the periodic table, it is a halogen and has 7 valence electrons, therefore it is a very reactive element and tends to form bonds with elements of group IA that have a valence electron.
2) Due to its high electronegativity, it tends to steal electrons, so it is an oxidizing element, it is solid at room temperature, opaque and has a purple-gray color in the solid state and violet in the gaseous state.
In summary, two properties of iodine will be:
1) Very reactive element
2) Oxidizing element
Other properties that you can add are:
3) solid at room temperature.
4) Opaque