How do aluminum and sulfur bond?

With Apolar Covalent bonds. Since their electronegativity difference isn't that big, the way they bond with each other is by sharing their electrons with them. It is like they are a couple holding hands together. read more

With Apolar Covalent bonds. Since their electronegativity difference isn't that big, the way they bond with each other is by sharing their electrons with them. It is like they are a couple holding hands together. read more

In your example, the electronegativity of aluminum is 1.61, while that of sulfur is 2.58. This is a moderately large difference, so the Al-S bond is moderately ionic. If you don't want to have to actually look up and compare electronegativities, we can make some generalizations. read more

Reacting aluminium and sulfur forms Al2S3. The reaction produces a lot of heat and forms the colorless aluminium(III) sulfide. This is a covalent compound. read more

Sulfur only needs two electrons to have a full valence electron shell, and since each covalent bond has two electrons, sulfur can only form 1 bond. read more