Table of Contents
Why does silicon have a higher melting point than sulfur?
Silicon also has a giant covalent structure just like carbon. The difference is that B-B bonds tend to be a lot stronger than Si-Si bonds. Stronger bonds mean more energy to break which means higher melting point.
Why sulfur has a quite low melting point?
Phosphorus, sulphur, chlorine and argon are simple molecular substances with only van der Waals attractions between the molecules. Their melting or boiling points will be lower than those of the first four members of the period which have giant structures.
Why sulfur has a low boiling point?
When sulfur dioxide is boiled, it is the weak intermolecular forces which are broken and not the strong covalent bonds. Only a small of amount of energy is required to break the intermolecular forces so the boling point is low.
Does sulfur have a high melting point?
235°F (112.8°C)
Sulfur/Melting point
Does sulfur have a low melting point?
Phosphorus, sulfur, chlorine and argon These elements are non-metals. The melting and boiling points of these elements are very low because: van der Waals’ forces are very weak forces of attraction …
Does Sulphur have a low melting point?
Phosphorus, sulfur, chlorine and argon are simple molecular substances with only van der Waals attractions between the molecules. Their melting or boiling points will be lower than those of the first four members of the period which have giant structures.
Why does silicon have a lower melting point than diamond?
Silicon carbide has a C-Si bond length of 186 p.m. and a bond strength of 318 kJ/mol. Diamond has a much shorter C-C bond length (154 pm) and stronger bonds (348 kJ/mol). Thus, it takes more energy to vaporize diamond, and diamond has the higher sublimation temperature.
Why Sulphur hexafluoride have a low boiling point?
Like other covalent substances, there are strong covalent bonds within the molecules but only weak (Van der Waals’) forces between molecules, so that it has a low boiling point and melting point (actually it sublimes, at -63.7°C).
What causes low melting point?
Explanation. There are intermolecular forces between small molecules. Intermolecular forces are much weaker than the strong covalent bonds in molecules. Relatively little energy is needed to overcome the intermolecular forces, so small molecular substances have low melting and boiling points.
Why does silicon have the highest melting point and argon?
Silicon has strong covalent bonds linking the atoms together in a tetrahedral macromolecular structure. This is a giant covalent structure. Lots of energy is required to overcome the strong covalent bonds, so silicon has the highest melting point.