1. The problem asks: How many aluminum atoms are in the chemical formula Al₂(SO₄)₃? 2. The formula Al₂(SO₄)₃ means there are 2 aluminum (Al) atoms per formula unit. 3. The subscript 2 after Al indicates the number of aluminum atoms directly: $\text{Al}_2$ means 2 aluminum atoms. 4. The rest of the formula, $(SO_4)_3$, indicates sulfate groups and does not affect the count of aluminum atoms. 5. Therefore, the number of aluminum atoms in Al₂(SO₄)₃ is simply $2$. Final answer: 2 aluminum atoms.