Question

Predict the formula of a compound formed by aluminium and sulphur.

• A. $Al_{2}S_{2}$
• B. $Al_{3}S_{2}$
• C. $Al_{2}S_{3}$
• D. AIS

Answer 1

Answer: (C)

$Al_{2}S_{3}$

Answer 2

: $Al - 3e^{-} \rightarrow Al^{3 +}$

$S + 2e^{-} \rightarrow s^{2 -}$

The formula for its sulphide is $Al_{2}S_{3}$