Aluminum ions have a charge of 3+, and sulfide ions have a charge of 2- . Using the crossover method of determining the formula unit of an ionic compound gives us the formula Al2S3.
Al2(SO4)3
The chemical formula of an ionic compound that contains aluminium and chlorine is aluminium chloride - AlCl3.
The compound is aluminium phosphide and the chemical formula is AlP.
The chemical formula of aluminium iodide is AlI3.
Aluminium fluoride is AlF3.
Al2(CO3)3
The chemical formula of an ionic compound that contains aluminium and chlorine is aluminium chloride - AlCl3.
The most important compound of aluminium is the aluminium trioxide - Al2O3.
The compound is aluminium phosphide and the chemical formula is AlP.
The chemical formula of aluminium iodide is AlI3.
aluminium sulfate
Aluminium fluoride is AlF3.
This compound is aluminium trichloride.
Al2(CO3)3
AlO2
This compound is aluminium chlorate.
Aluminium is manufactured. The compound from which you get Aluminium is 'bauxite' with the chemical formula Al(OH)3 .
AlCl3 is the correct formula as the valency of aluminium and chlorine are 3 and 1 respectively.