Take into account that oxygen has a negative 2 charge (O-2) and there are 3 of them; therefore, to form this compound Cobalt must have a positive 3 charge (Co3+) because there are 2 of them.
The name of this compound is Cobalt (III) oxide or Cobaltic oxide.
The name for the binary ionic compound CdO is cadmium oxide.
The binary ionic compound name for NaBr is sodium bromide.
Barium Dichloride is NOT correct. The name is Barium Chloride it is a binary ionic compound.
Beryllium nitride (Be3N2) is the compound formed by the elements beryllium and nitrogen. It is a binary ionic compound with a 2:3 ratio of beryllium to nitrogen atoms.
Chromium Phosphide... Cr is the element Chromium and P is the element Phosphorus (It's a binary ionic compound -2 elements- so the second element ends in -ide)
The name of the binary ionic compound Li3N is lithium nitride.
The name of the binary ionic compound AgClO is silver hypochlorite.
The name for the binary ionic compound CdO is cadmium oxide.
The name for the binary ionic compound SnO is tin(II) oxide.
The binary ionic compound name of Tc3P4 is technetium(III) phosphide.
The first part of the name of a binary ionic compound is the name of the cation, which is the positively charged ion.
The name of the simple binary ionic compound Al2S3 is aluminum sulfide.
The name of the binary ionic compound for SrSe is strontium selenide.
The simple binary ionic compound for AgCl is silver chloride.
cation
Calcium oxide.
In naming a binary ionic compound, the name of the cation (metal) appears first, followed by the name of the anion (non-metal). The cation keeps its elemental name, while the anion's name is modified to end in "-ide".