The words "covalent" and "ionic" refer to bonds between atoms, and not atoms themselves.
If you are referring to O2 and F2, the forms in which we find oxygen and fluorine, respectively, then the bond between the two oxygens is considered to be non-polar and covalent. The same can be said of the bond between the two fluorine atoms in F2.
If you are referring to the bonds in the compound formed by oxygen and fluorine, you must first identify that compound. It is OF2, and is named "fluorine oxide". The bonds between the oxygen and fluorine in fluorine oxide are slightly polar and covalent.
The determining property is "electronegativity", which you should look up and review. By convention, when the electronegativity difference between atoms is:
< about 0.4, the bond between them is non-polar and covalent
between about 0.4 - 1.7, then bond between them is polar and covalent
> 1.7, then bond between them is ionic.
N is less electronegative than F. Therefore, NF3 is considered a covalent compound rather than an ionic compound.
MgF2 is considered ionic because it is composed of a metal (Mg) and a nonmetal (F) which typically form ionic bonds due to the large difference in electronegativity between the two elements.
BeF2 is a covalent compound. Beryllium (Be) is a metal and fluorine (F) is a non-metal, which results in a polar covalent bond between them.
The bond between F and Cl is a polar covalent bond. Fluorine is very electronegative and Cl is not as much. The difference is large enough to be considered polar.
No, it is not a covalent bond. It is an Ionic bond.
The F-F bond (in F2) is covalent, and non polar covalent at that.
Typically carbon forms a covalent, not ionic bond.
N is less electronegative than F. Therefore, NF3 is considered a covalent compound rather than an ionic compound.
MgF2 is considered ionic because it is composed of a metal (Mg) and a nonmetal (F) which typically form ionic bonds due to the large difference in electronegativity between the two elements.
BeF2 is a covalent compound. Beryllium (Be) is a metal and fluorine (F) is a non-metal, which results in a polar covalent bond between them.
The bond between F and Cl is a polar covalent bond. Fluorine is very electronegative and Cl is not as much. The difference is large enough to be considered polar.
No, it is not a covalent bond. It is an Ionic bond.
CaF2 is considered an ionic compound because it is composed of a metal cation (Ca) and a nonmetal anion (F) bonded together through ionic bonds. It is not considered as polar or nonpolar since ionic compounds do not have distinct polar or nonpolar characteristics as covalent compounds do.
The bond between K and F is not covalent; it is an ionic bond. Potassium (K) is a metal and fluorine (F) is a nonmetal, so they tend to form ionic bonds by transferring electrons.
BaF2 is an ionic compound composed of a metal (Ba) and a non-metal (F). The bond between Ba and F in BaF2 is considered ionic because the electronegativity difference between Ba and F is large enough for Ba to donate electrons to F, resulting in the formation of positive and negative ions.
No "NaF" is Nonpolar covalent because 4.0 - 0.9 is in the Nonpolar covalent range.
No, AlF3 is not covalent. It is an ionic compound composed of aluminum cations (Al^3+) and fluoride anions (F^-).