DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ2.a.i
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.sl.TZ2.a.i |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Justify | Question number | a.i | Adapted from | N/A |
a.i.
[Maximum mark: 2]
18M.3.sl.TZ2.a.i
The table summarizes some properties of graphite and graphene.
Graphene is two-dimensional, rather than three-dimensional, material.
Justify this by using the structure of graphene and information from the table.
[2]
Markscheme
consists of single/one sheet/layer «of carbon atoms»
graphene has no density measurement
OR
graphene has no distance between layers data
OR
graphene has large specific surface area «compared to graphite»
Do not accept “sp2” alone without reference to single/one sheet/layer.
Accept “thickness of one atom” OR “consists of a plane” for M1.
[2 marks]
