Question

key: al o what is the formula for this ionic crystal? submit your answer al₂o₃ al₄o₆ al₄o₅ al₃o₂ correct: 9 incorrect: 1

Explanation:

Step1: Count the number of Al atoms

There are 2 Al atoms in the model.

Step2: Count the number of O atoms

There are 3 O atoms in the model.

Step3: Write the formula

The formula is based on the ratio of Al to O atoms. The ratio of Al to O is 2:3, so the formula is \(Al_2O_3\).

Answer:

\(Al_2O_3\)