Structure of the atom By Abhinav Anand
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In 1900, J.J. Thomson discovered electrons in atoms. In 1886, E. Goldstein discovered positively charged canal rays, later identified as protons. In 1932, Chadwick discovered neutrons, neutral particles in atoms.
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Structure of the atom By Abhinav Anand
- 3. In 1900, J. J. Thomson discovered the presence of the negatively charged particles called electrons in the atom. In 1886, E. Goldstein discovered new radiations in gas discharge and called them canal rays. These rays were positively charged. This later led to the discovery of the positively charged particles called protons in the atom. In 1932 Chadwick discovered the presence of particles having no charge in the atom called neutrons
- 7. Negatively charged electron Positively charged nucleus Negatively charged electrons in orbits around the nucleus Rutherford’s model Very small positively charged nucleus - - of an atom - +
- 8. Shells or energy levels in an atom
- 10. H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar
- 13. 1 2 3 1 1 1 12 14 6 6
- 14. 40 40 Ca Ar 20 18 58 58 26 27 Fe Ni