Question

Aluminum forms an ionic compound with an element to give the formula Al2X3. Which ion below could be X?

Answer 1

`S^(2-)`

Step-by-step explanation:

Here, we want to know the possible ion with which aluminium forms the hypothetical compound

As we know, aluminium is a metallic compound and thus have a positive ion. The charge on this ion is +3

This is evident from the hypothetical compound

However, we can see that for a compund to be formed, we need an interchanging of ions and that would serve as the subscript

From the hypothetical compound, we can see that the subscript is 2

That automatically means that we need an ion with a -2 charge

Looking at the option, we can see this in S2-

This will serve as the correct choice for X