Is Iodine an Acid or Base?

Iodine is a lewis acid, iodine, denoted by the letter "I", is a nonmetallic chemical element with atomic number 53 and a dark brown or purple-black color.

1. Despite the fact that it can form compounds with many other elements, it is the least reactive and most electropositive halogen.
2. In brine pools and oceans, it exists mainly as a water-soluble iodide.
3. When heated, this substance emits a purple color.
4. It dissolves only partially in water and also in some solvents such as carbon tetrachloride.
5. Iodine can be found naturally in air, soil, and water.
6. Oceans are the major source of this element. There are also minerals that contain iodine.
7. Iodine is an essential component for the proper functioning of the human brain, for almost every cell in the body it is necessary.

Lewis acid: Lewis acids are chemical entities that can accept electron pairs from Lewis bases because they have empty orbitals. With a triangular planar structure and an empty p-orbital, this term was traditionally used to define chemical species. Such a Lewis acid would include ${\mathbf{BR}}_{\mathbf{3}}$ (where R could be a halide or an organic material).

Hence, Iodine is a lewis acid.