Final Answer:
The compound contains atoms as stated in option A: 2 Aluminum, 1 Carbon, and 9 Oxygen.
Explanation:
The compound's chemical formula suggests it contains 2 atoms of Aluminum (Al), 1 atom of Carbon (C), and 9 atoms of Oxygen (O). The representation of chemical compounds with their constituent atoms relies on the numbers indicated as subscripts after each element's symbol. In this case, the numbers given indicate the quantity of each element present in the compound. The chemical formula (Al2CO9) describes the compound's composition.
Aluminum is represented by the symbol Al, Carbon by C, and Oxygen by O in the periodic table. The subscript numbers (2, 1, and 9, respectively) denote the quantity of each element within the compound. Thus, the compound specified contains 2 atoms of Aluminum, 1 atom of Carbon, and 9 atoms of Oxygen. By following the rules of chemical formulas, this configuration corresponds to option A: 2 Aluminum, 1 Carbon, and 9 Oxygen.
In chemical formulas, the subscripts following the element symbols indicate the number of atoms for each element within a compound. These numbers reflect the ratio of the elements present in the compound. Therefore, by interpreting the provided formula and the periodic table's elemental symbols and atomic numbers, we confirm that the compound contains 2 Aluminum, 1 Carbon, and 9 Oxygen atoms as represented in option A.