Why does zinc have a high melting point?
Zinc has electrostatic forces of attraction between opposite metal ions and delocalised electrons meaning it needs a lot of energy to separate metal ions
Why does sodium chloride have a high melting point?
Sodium chloride has electrostatic forces of attraction between opposite charged ions meaning it needs a lot of energy to separate ions
Why does diamond have a high melting point?
Diamond has strong covalent bonds between all atoms and requires a lot of energy to break all four bonds.
Why does chlorine have a low melting point?
It has weak intermolecular forces between molecules so requires little energy to separate the molecules.
Why can diamond not dissolve in water?
Water cannot separate its atoms
Why can sodium chloride dissolve in water?
Water can separate its ions
