HgBr2 is mercury II bromide or mercuric bromide.
The systematic name for HgBr₂ is mercury(II) bromide. In this compound, mercury has a +2 oxidation state, indicated by the Roman numeral II in the name, and it is combined with two bromide ions (Br⁻).
The correct name for the compound NCl3 is nitrogen trichloride.
The correct name for the compound K2S is potassium sulfide.
The correct compound name for AlF3 is aluminum fluoride.
The correct compound name for BaO is barium oxide.
The correct name for the compound PCI is phosphorus trichloride.
The correct name for the compound CS2 is carbon disulfide.
The correct name of the compound N2O4 is dinitrogen tetroxide.
The correct name for the compound S3Cl2 is disulfur dichloride.
The correct name for HgO compound is mercury(II) oxide.
Mercury(II) bromide