The diagram below (which is not drawn to scale) represents some of the possible electron energy levels in a hydrogen atom. n= n=6 n=5 n=4 n=3 n=2 n=1 (a) Copy this diagram and draw an arrow to represent the electron transition for the ionisation of a hydrogen atom. Label this arrow A. (3) (b) Draw arrows on the diagram to represent the two lowest energy electron transitions in the visible spectrum. Label these arrows B and C. (3)