Based on the following electronegativity values, which of the following best explains the polarity of the bond formed?

Element

Electronegativity
Carbon 2.5
Fluorine 4.0
Lithium 1.0




Question 1 options:

Li-F is covalent because the electronegativity difference is 5.0


C-F is ionic because the electronegativity difference is 1.5


Li-F is ionic because the electronegativity difference is 3.0


C-F is covalent because the electronegativity difference is 6.5