Question 1
Paper 2Easy6 marksFigure 1 shows nuclear notation and schematic emission and absorption spectra for an element.
(a)[3]
In the nuclear notation shown in Figure 1, state what and represent, and calculate the number of neutrons in the nucleus.
(b)[1]
Describe one feature of the line positions in the spectra shown in Figure 1.
(c)[2]
Explain how the spectra provide evidence that atomic energy levels are discrete.