The ionic compound CaI2 is named Calcium Iodide.
Calcium (Ca) is a metal from Group 2 of the periodic table, known as the alkaline earth metals. It typically forms a +2 charge when it becomes an ion. Iodine (I), on the other hand, is a non-metal from Group 17, and it forms a -1 charge when it gains an electron to become an iodide ion.
In CaI2, one calcium ion pairs with two iodide ions to balance the charges. The name reflects the cation (Calcium) first, followed by the name of the anion (Iodide), and we use the ‘ide’ suffix to denote the iodide ion. Therefore, when combined, the compound is called Calcium Iodide.