2.3+Giant+covalent+substances

Covalent structures are made by covalent bonding. These bonds are very strong.Giant Covalent Structures are held together by lots of covalent bonds between atoms. Giant covalent substances include: All giant convalent structures have special properties such as being hard, having high melting points and being very unreactive. Graphite also conducts electricity, whereas Diamond doesn't. Silicon dioxide is a semi coductor. The atoms are arranes into "Giant Regular Lattices", which means that they are incredibly strong.
 * Giant Covalent Structures **
 * Diamond
 * Silicon dioxide
 * Graphite