DP Chemistry (last assessment 2024)

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Question 21N.2.hl.TZ0.2b

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.2.hl.TZ0.2b
Level hl Paper 2 Time zone TZ0
Command term Calculate Question number b Adapted from N/A
b.
[Maximum mark: 1]
21N.2.hl.TZ0.2b

Electron transitions are related to trends in the periodic table.

(b)

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» ✔

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