The type of chemical bond that occurs between calcium (Ca) and fluorine (F) is ionic.
Here’s why: Calcium is an alkaline earth metal and has two electrons in its outer shell, which it readily loses to achieve a stable electron configuration. On the other hand, fluorine is a halogen and has seven electrons in its outer shell. It needs one more electron to fill its outer shell, making it highly electronegative and eager to gain an electron.
When calcium and fluorine react, calcium donates its two outer electrons to two fluorine atoms, resulting in the formation of Ca2+ and two F– ions. The electrostatic attraction between the positively charged calcium ions and the negatively charged fluoride ions creates an ionic bond. This results in the formation of calcium fluoride (CaF2), a compound characterized by strong ionic bonds between its constituent ions.