Question

melting point of sulfur molecule is greater than phosphorus molecule, why?​

Answer 1

Answer:

Explanation:

Phosphorous exist as P4 molecules which is relatively small. Therefore the Van der Waals forces will be far weaker causing the melting and boiling point to be low. Sulphur on the other hand forms molecules with 8 atoms. These molecules are obviously bigger than Phosphorous. This causes the melting and boiling point to be higher due to stronger Van der Waals forces.