The figure shows the energy levels available to an electron in one atom.
Figure: The energy levels available to an electron in an atom

Complete the sentence.
For the electron to move from level 2 to level 3, the atom must ________ electromagnetic radiation.
The electron then moves from level 3 to level 1. Describe what the atom does as the electron moves.
Give the charge on an electron.
The atom shown in the figure has no overall charge. Explain why.
40 exam-style questions on AQA GCSE Physics 4.1 Atoms and isotopes, covering 4.1.1 The structure of an atom, 4.1.2 Mass number, atomic number and isotopes, and 4.1.3 The development of the model of the atom (common content with chemistry). Each one has a worked solution and a mark scheme showing where the marks go.