Chapter 4, Structure of the Atom CBSE Board Class 9, NCERT Science (Chemistry) Solutions of Chapter Intext Questions Q.1: What are canal rays? Q.2: If an atom contains one electron and one proton, will it carry any charge or not? Q.3: On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole. Q.4: On the basis of Rutherford’s model of an atom,