Final answer:
The formula for the compound formed by calcium ions (Ca2+) and nitrogen ions (N3-) is Ca3N2, and its name is calcium nitride.
Step-by-step explanation:
The formula for the ionic compound formed by calcium ions (Ca2+) and nitrogen ions (N3-) is derived by balancing the charges of the ions. Calcium has a 2+ charge and nitrogen has a 3- charge. Using the crisscross method to ensure the final formula is neutral, we take the absolute value of the charge on one ion and make it the subscript of the other ion. Thus, the proper formula for this compound is Ca3N2.
The name of this compound is calcium nitride.