Chapter 4 - Structure Of The Atom Excercise 47 Solution 1 They are the positively charged radiations which consist of positively charged particles of atoms. Canal rays pass through perforated cathode and then travel towards another cathode in a gas discharge tube. They were given the name Canal rays by E. Goldstein in 1866 who discovered these radiations. Concept insight: Write the proper definiton of canal rays Solution 2 An atom having one electron and one proton will not carry any charge as the positive charge on the proton will neutralise the negative charge on the electron. Concept insight: Remember that electron carries a -1 charge and proton carries a +1 charge. Chapter 4 - Structure Of The Atom Excercise 49 - I Solution 1 Thomson proposed a model of an atom. According to this model of an atom, an atom consists of a sphere of positive charge. The positive charge in the atom is spread all over like the red edible ...