DP Chemistry (last assessment 2024)
Question 18N.3.hl.TZ0.12a
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.3.hl.TZ0.12a |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | Explain | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
18N.3.hl.TZ0.12a
The Sun’s energy is produced by the fusion of hydrogen nuclei.
(a)
Explain fusion reactions with reference to binding energy.
[2]
Markscheme
small/lighter nuclei combine to form larger/heavier nuclei ✔
product has higher binding energy «per nucleon» ✔
Accept binding energy curve with explanation.
