Final answer:
The ionic compound formed by Ca²⁻ and ClO₃⁻ has the chemical formula Ca(ClO₃)₂, with two chlorate ions balancing the charge of one calcium ion.
Step-by-step explanation:
The chemical formula for the ionic compound formed by Ca²⁻ and ClO₃⁻ can be predicted by balancing the charges of the cations and anions. Calcium ion has a charge of +2, and the chlorate ion has a charge of -1. To balance the charges, we need two chlorate ions to neutralize the charge of one calcium ion, resulting in the formula Ca(ClO₃)₂.
The chemical formula for the ionic compound formed by Ca²⁺ and ClO₃⁻ is option d) Ca₂(ClO₃)₃.
In order to determine the proper formula for an ionic compound, we need to balance the charges of the ions. The Ca²⁺ ion has a positive charge of 2, while the ClO₃⁻ ion has a negative charge of 1. To balance the charges, we need to have two Ca²⁺ ions and three ClO₃⁻ ions, resulting in the formula Ca₂(ClO₃)₃.
Therefore, the correct answer is c) Ca(ClO₃)₂.