Answer to Question #279145 in General Chemistry for Aaron

Question

magnesium oxide has a high melting point carbon dioxide has a low melting point which row identifies the attractive forces that are broken when these compunds are melted

Answer 1

In the case of Silicon dioxide, two different types of bonding is present. It is because, in it, each silicon atom is bonded with four oxygen atoms and each oxygen atoms is bonded with two silicon atom giving it a giant structure.