The question requires us to present the chemical formula for different ionic compounds.
To do that, we need to analyze the charge of the cations and anions involved and determine the appropriate number of atoms for each molecule.
- Lithium chloride involves the cation Li+ (charge = +1) and anion Cl- (charge = -1):
Since both cation and anion have the same ionic charge (+1 and -1), the chemical formula is LiCl.
- Cuprite corresponds to copper(I) oxide. In this case, we have the cation Cu+ (charge = +1) and anion O2- (charge = -2).
In this case, to balance the charges and achieve zero net charge, the chemical formula is Cu2O.
- Nantokite corresponds to copper(I) chloride - then, we have Cu+ (charge = +1) and Cl- (charge = -1)
Similarly to LiCl, the chemical formula for nantokite would be CuCl because we can achieve zero net charge with only one atom of both Cu and Cl.
- Chaclocite corresponds to copper(I) sulfide - in this case, we have Cu+ (charge = +1) and S2- (charge = -2)
(an strategy you can use, shown in the image above, is to "cross" the charges to obtain the number of atoms needed in the chemical formula)
To achieve zero net charge, we need two atoms of Cu(I) and one atom of S - then, the chemical formula would be Cu2S