IB Physics SL E.1 Structure of the atom questions

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Question 1

Paper 2Easy6 marks

Figure 1 shows nuclear notation and schematic emission and absorption spectra for an element.

2311Xemission spectrumabsorption spectrum400450500550wavelength / nm
(a)

In the nuclear notation shown in Figure 1, state what AA and ZZ represent, and calculate the number of neutrons in the nucleus.

[3]
(b)

Describe one feature of the line positions in the spectra shown in Figure 1.

[1]
(c)

Explain how the spectra provide evidence that atomic energy levels are discrete.

[2]

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