DP Chemistry (last assessment 2024)
Question 21N.2.hl.TZ0.b
| Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.2.hl.TZ0.b |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Calculate | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 1]
21N.2.hl.TZ0.b
Electron transitions are related to trends in the periodic table.
Sodium emits yellow light with a frequency of 5.09 × 1014 Hz when electrons transition from 3p to 3s orbitals.
Calculate the energy difference, in J, between these two orbitals using sections 1 and 2 of the data booklet.
Darling, D, n.d. D lines (of sodium). [online] Available at <https://www.daviddarling.info/encyclopedia/D/D_lines.html> [Accessed 6 May 2020].
[1]
Markscheme
«ΔE = hν = 6.63 × 10–34 J s × 5.09 × 1014 s–1 =» 3.37 × 10–19 «J» ✔
