Iodine is an element in Group 7A of the periodic table. Which type of ion does iodine form?

1 Answer
Dec 30, 2016

Answer:

Iodine has a high nuclear charge..........that is not terribly well shielded by its incomplete valence shell of electrons.

Explanation:

..........Iodine thus tends to attract electron density, and the addition of a single electron will provide a full valence shell. Thus it is reduced and forms an #"iodide ion"#, #I^-#. All the halogens form this ion upon reduction:

#1/2X_2+e^(-) rarr X^-#