multiple - choice question what is the name of al2s3? aluminum (iii) sulfide aluminum sulfide dialuminum…

Brief Explanations:

Aluminum ($Al$) is a metal with a common oxidation state of +3, and sulfur ($S$) forms sulfide ions. In naming ionic compounds, we simply state the metal name followed by the non - metal name with its ending changed to 'ide'. For binary ionic compounds like $Al_2S_3$, we don't use prefixes like 'di -' and 'tri -' as we do for covalent compounds. Also, we don't need to indicate the oxidation state of aluminum in parentheses since aluminum has a common and well - known oxidation state in most of its compounds.

Answer:

B. aluminum sulfide