Class 9 | Science | Chapter 4|Structure of the Atom | NCERT Solutions Page 47 1. What are canal rays? Answer: Canal rays are positively charged radiations. These rays consist of positively charged particles known as protons. They were discovered by Gold stein in 1886. 2. If an atom contains one electron and one proton, will it carry any charge or … [Read more...] about Chapter 4 Structure of the Atom