The diagram shows the structures of three substances that have giant covalent structures.
Which does not provide the correct explanation of the property of a substance?
Substance | Property | Explanation | |
A | graphite | conducts electricity | its ions are free to move through the layers |
B | diamond | hard | each carbon atom is covalently bonded to four other carbon atoms |
C | silicon dioxide | high melting point | it has many strong covalent bonds which require a large amount of energy to break |
D | graphite | soft | its layers can slide over each other |
☐ | A | ||
☐ | B | ||
☐ | C | ||
☐ | D |
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