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Chemistry
Grade-9
Easy
Question
What is the correct formula for aluminum sulfide?
Al3S2
Al2S
AlS2
Al2S3
Hint:
A compound always tends to be neutral.
The correct answer is: Al2S3
In the chemical formula, metals are written first followed by non-metals.
The subscript tells about the number of atoms present in each.
A compound always tends to be neutral.
Aluminum has an oxidation state of +3, and sulfur has an oxidation state of -2. To make the compound neutral two aluminum atoms and three sulfur atoms are required. Hence, the correct formula for aluminum sulfide is Al2S3.