Answer:
Ionic
Explanation:
Calcium is present in group two. It has two valance electrons. It loses its two electrons to get complete octet.
Fluorine is present in group seventeen. It has seven valance electrons. It needed just one electrons to complete the octet. That's why two fluorine atoms are bonded with one calcium atom.
When both react with each other ionic compound is formed between them because of large electronegativity difference. The electronegativity of fluorine is 3.98 and for calcium is 1. There is large difference is present. That's why electrons from calcium is transfer to the fluorine. Calcium becomes positive and fluorine becomes negative ion. Both atoms are bonded together electrostatic attraction occur between anion and cations.
Ca + F₂ → CaF₂
