| A | B |
|---|
| diamond | hardest natural substance |
| graphite | found in pencils |
| allotrope | same element but different structures |
| electrical conductor | property of graphite |
| four | number of single covalent bonds formed by carbon in diamond |
| three | number of single covalent bonds formed by carbon in graphite |
| buckminster fullerene | the third allotrope of carbon |
| layer structure | this is found in graphite |
| tetrahedral structure | this is found in diamond |
| single covalent bonds | found in diamond and graphite |
