1. Look up the electronegativity values:
* Calcium (Ca): 1.00
* Fluorine (F): 3.98
2. Calculate the difference:
* Electronegativity difference = 3.98 - 1.00 = 2.98
What does this tell us?
* Ionic Character: A large electronegativity difference (like 2.98) indicates a significant difference in the ability of the atoms to attract electrons. This usually results in an ionic bond, where one atom (in this case, Fluorine) gains electrons and becomes an anion, while the other atom (Calcium) loses electrons and becomes a cation.
Important Note: While CaF₂ is considered an ionic compound due to the large electronegativity difference, no bond is purely ionic or covalent. There is always some degree of covalent character in ionic bonds, and vice versa.
