Answer:
Mercuric triiodide.
Explanation:
HgI3 is the compound that contains Hg (mercury), and I (iodine).
We have 1 atom of Hg, and 3 atoms of I bonded to Hg:
The (-1) is indicating that this molecule represents an ion (anion).
Based on the systematic nomenclature, as we have three iodines, and the nonmetal atom (I) has the suffix of -ide proceeded by the name of the metal (Hg), the name would be mercuric triiodide.
