What is the valency of Iodine?

Valency

• The valency of an atom refers to its ability to combine with other atoms.
• The valency of an element determines the number of bonds that an atom can make as part of a complex.
• The electrons in the atom's outermost orbit are referred to as valence electrons.

Valency of Iodine

• Iodine is a dark grey or purple blackish nonmetallic element with an atomic number $53$ in the Periodic Table.
• Although it may form compounds with a variety of elements, it is the least reactive and electropositive halogen.
• It is mostly found as water-soluble iodide in brine pools and oceans on Earth.
• It is not completely soluble in water, but it can be broken down in certain solvents, such as carbon tetrachloride.
• The electronic configuration of Iodine can be represented as$\left[\mathrm{Kr}\right]4{\mathrm{d}}^{10}5{\mathrm{s}}^{2}5{\mathrm{p}}^5$.
• This shows the valency of iodine is$-1$.
• It is stable because it has 7 electrons in its final shell and gets one electron to make it stable.

Thus the valency of Iodine is $-1$.