What is the formula of the ionic compound expected to form between the elements sulfur and aluminum?

Question

What is the formula of the ionic compound expected to form between the elements sulfur and aluminum?

asked Jan 17, 2022 by anonymous

1 Answer

Answer :

The aluminum ion is Al3+ and the sulfide ion is S2-. The formula for aluminum sulfide is Al2S3. In an ionic compound, the size of the charge of each ion becomes the subscript on the opposite ion. This is called the crisscross rule. https://www.YouTube.com/watch?v=99NVKAss5LE&t=240s

answered Jan 17, 2022 by anonymous

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