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Showing posts from September 26, 2013

Structure of the Atom | Class 9 CBSE Guide for Chapter 4 Science (Chemistry) | NCERT Answers of In-text Questions

Chapter 4, Structure of the Atom   Class 9, NCERT (CBSE) Science - Solutions of In-Text Questions    NCERT Solutions - CBSE Guide Question.1: What are canal rays? Answer: Canal rays are positively charged radiations consisting of particles which have a charge equal in magnitude but opposite in sign to that of the electron. The mass of a canal ray particle is 2000 times as that of an