What are the option for the questions???
Melting points and boiling points of molecular compound are usually lower than ionic compounds. This is so as only a small amount of energy is required to overcome the weak intermolecular forces of attraction (Van de Waals forces) thus having lower m.p. and b.p.
Ionic compounds require a large amount of energy to overcome the strong electrostatic forces of attraction between the ions, hence having higher mp and bp
Answer:
4th line
Explanation:
-water cycle helps regulate the temperature on the Earth.
The average kinetic energy and thermal energy decreases, and the temperature decreases as well.
