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!
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.
1
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.