Sulfur only needs two electrons to have a full valence electron shell, and since each covalent bond has two electrons, sulfur can only form 1 bond.
2
In almost any case four covalent or polar-covalent bonds are formed. Never ionic!
1
It depends on the element Following what one might call "normal" valence an atom such as carbon can form up to 4 bonds. But in some compounds, such as sulfur hexafluoride and atom can bond with as many as six other atoms.
BaBr2 has two ionic bonds, but no covalent bonds.
Sulfur can form two covalent bonds as in H2S, and can form 6 as in SO3. In elemnatl allotropes of sulfur which are covalent bonded, many are cyclic compounds the number of covalent onds is 2.
maximum number of covalent bonds typically formed by fluorine is 1
2
3 covalent bonds can be formed by Nitrogen
2
compound
2
Boron will form the covalent bonds based on the octet rule.
In almost any case four covalent or polar-covalent bonds are formed. Never ionic!
four
4 single bonds! or variations with double bonds!!
Ionic bonds are never formed in a covalent bond. Although, there are ions such as sulfate, nitrate and chlorate where covalent bonds are located inside the ion.