1. Determine the charges:
* Calcium (Ca) is in group 2 of the periodic table, meaning it forms a +2 cation (Ca²⁺).
* Bromine (Br) is in group 17 of the periodic table, meaning it forms a -1 anion (Br⁻).
2. Balance the charges:
To create a neutral compound, the charges must balance. Since calcium has a +2 charge and bromine has a -1 charge, we need two bromine ions to balance the charge of one calcium ion.
3. Write the formula:
The formula for the ionic compound is CaBr₂.
