An atom emits electromagnetic radiation. Which statement about the atom after the emission is correct?
One of its electrons is in a higher energy level and the atom is neutral.
One of its electrons is in a lower energy level and the atom is neutral.
One of its electrons has been lost and the atom is now a positive ion.
One of its protons has been lost and the atom is now a negative ion.
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.