Generally, elements on the right hand side of the periodic table and also carbon. The Left hand side will tend to form ionic bonds
Yes because they have less than 8 valence electrons(7 to be exact). So they will bond in order to get one more electron. :O
Fluorine's electronegativity is 3.98. The difference between two fluorine atoms is 0, so the bond between two fluorine atoms is nonpolar covalent.
Fluorine forms both ionic bonds and covalent bonds, the former being more common.
No, they form an covalent bond.