| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.HL.TZ1.31 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 31 | Adapted from | N/A |
Question
Some of the energy levels for a hydrogen atom are shown in the diagram.
The table shows four photons with their corresponding energies.
Each photon is incident on a hydrogen atom in its ground state. Which photons could be absorbed by the atom?
A. W only
B. X and Y only
C. Y and Z only
D. X, Y and Z only
Markscheme
B
Examiners report
[N/A]
Syllabus sections
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