## Chemistry: The Central Science (13th Edition)

Name: Aluminum Iodide Formula: AlI$_{3}$
Aluminum wants to get rid of 3 electrons, each iodine atom wants another electron, therefore two ions are formed. Al$^{3+}$ and I$^{-}$, therefore you need three iodine ions for every one aluminum ion, therefore the formula is AlI$_{3}$. When naming ionic compounds, the positively charged ion keeps its name and the negatively charged ion has its ending dropped and replaced with -ide. Hence, the name is Aluminum Iodide.