Question

what would be the correct balanced formula for a compound made from aluminum and sulfur based on balance of charges?
ais
al₂s₂
al₂s₃
al₃s₂

Explanation:

Step1: Determine aluminum's charge

Aluminum (Al) is in group 13 of the periodic table and forms a +3 ion, $Al^{3 + }$.

Step2: Determine sulfur's charge

Sulfur (S) is in group 16 of the periodic table and forms a - 2 ion, $S^{2-}$.

Step3: Balance the charges

To balance the charges, we need to find the least - common multiple of 3 and 2, which is 6. We need 2 aluminum ions ($2\times(+ 3)=+6$) and 3 sulfur ions ($3\times(-2)= - 6$).

Answer:

C. $Al_2S_3$