Lewis Structure of Al2S3, Aluminum Sulfide

An aluminum atom (a metal) has three electrons in its valence (outer) shell to give away. Sulfur atoms (non-metals) have six electrons in their outer shells, so they require just two more electrons each to have a stable octet. This mean that TWO aluminum can give its electrons away to THREE suflurs, to create a stable ionic unit called aluminum sulfide. Its formula is Al2S3 and it has two Al(+3) ion with three S(-2) ions. Check me out: www.chemistnate.com