The compound formed by the ionic bond between calcium (Ca) and fluorine (F) is calcium fluoride, with the chemical formula CaF₂.

Here's why:

* Calcium is in group 2 of the periodic table, meaning it loses two electrons to form a +2 cation (Ca²⁺).

* Fluorine is in group 17, meaning it gains one electron to form a -1 anion (F⁻).

* To balance the charges, two fluoride ions are needed for each calcium ion, resulting in the formula CaF₂.