IB Chemistry HL 2.2.7 Covalent Network Structures Question Bank

Allotropes:

Any three allotropes for [1] from:
diamond
graphite
fullerene
graphene;

Marking guidance:

Allow (carbon) nanotubes for graphene.
Accept $C_{60} / C_{70} /$ buckminsterfullerene/bucky balls for fullerene.
Structures:
Any three for [3] from:
Diamond:
tetrahedral arrangement of (carbon) atoms/each carbon bonded to four others / $\mathrm{sp}^{3}$ and 3D/covalent network structure;
Graphite:
each carbon bonded to three others (in a trigonal planar arrangement) / $\mathrm{sp}^{2}$ and 2D / layers of (carbon) atoms;
Fullerene:
each (carbon) atom bonded to three others (in a trigonal arrangement) / $\mathrm{sp}^{2}$ and joined in a ball/cage/sphere/connected hexagons and pentagons;
Accept "trigonal planar" for "each carbon atom bonded to three others" part in M4.
Graphene:
each carbon bonded to three others (in a trigonal arrangement) / $\mathrm{sp}^{2}$ and 2D structure;