16 marks
The following table gives information about six substances.
substance | melting point / oC | boiling point / oC | electrical conductivity as a solid | electrical conductivity as a liquid |
|---|---|---|---|---|
A | 839 | 1484 | good | good |
B | -210 | -196 | poor | poor |
C | 776 | 1497 | poor | good |
D | -117 | 78 | poor | poor |
E | 1607 | 2227 | poor | poor |
F | -5 | 102 | poor | good |
Which substance could have a macromolecular structure, similar to that of silicon(IV) oxide?