Post a New Question


posted by .

Why does MgO have a higher melting point than CaS? They are both ionic compounds with the same charges, but CaS is heavier so shouldn't it have a higher melting point?

  • Chemistry -

    The charge of a large ion is less concentrated because of its larger radius and surface area. That makes the attraction between Ca^2+ and S^2- ions weaker than the attraction between the smaller Mg^2+ and O^2- ions.

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question