Class - 9 Science (Chemistry) Chapter - 4 Structure of Atom Notes, NCERT Solutions & Frequently Asked Questions
Class - 9 Science (Chemistry) Chapter - 4 Structure of Atom Notes, NCERT Solutions & Frequently Asked Questions -- Notes -- Atoms are the basic building blocks of matter. Different kinds of matter exist because there are different kinds of atoms present in them. Charged Particles in Matter Whenever we rub two objects together, they become electrically charged. This is because atoms contain charged particles in them. Therefore, atoms can be divided further into particles i.e proton, electron and neutron. Protons were discovered by Ernest Rutherford, in his famous gold foil experiment . Electrons were discovered by J.J. Thomson, in his cathode ray tube experiment . Neutrons were discovered by James Chadwick . Atoms consist o...