Chemistry

Structure of the Atom


2.Isotopes of Carbon.


The carbon element has three isotopes having the same atomic number of 6 but different mass numbers of 12,13 and 14.The three isotopes of carbon can be written as :
A= 126C A= 136C A= 146C
These three isotopes of carbon contain 6 protons and 6 electrons each but they contain an unequal number of neutrons. The C-12 isotope contains 12-6 = 6 neutrons, C-13 isotope contains 13 - 6 = 7 neutrons whereas the C-14 isotope contains 14 - 6 = 8 neutrons.

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Notes


Structure of the Atom - Notes
1. Drawback of Rutherford’s Model of the Atom
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2. Rutherford’s Experiment - Discovery of Nucleus
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3. For the symbols H, D and T,tabulate three sub-atomic particles found in each of them.
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4. 4.Isotopes of Neon.
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5. Structure of The Atom - Study Points
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6. 3.Isotopes of Oxygen.
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7. Radioactive Isotopes
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8. Characteristics of a Neutron
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9. Nucleus
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10. Arrangement Of Electrons In The Atoms
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11. Characteristics of an Electron
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12. (b) Valency of Magnesium
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13. Limitations of Rutherford's model of the atom
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14. Mass Number
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15. All about Names of the Chemical Elements
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16. How to learn naming Chemical Formulae?
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17. (d) Covalency of Nitrogen
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18. 1. Isotopes of Hydrogen.
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19. Characteristics of a Proton
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20. Comparison between Proton, Neutron and Electron
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21. Electronic Configurations of First 20 Elements
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22. (d) Valency of Chlorine
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23. Thomson's Model Of The Atom
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24. Discovery of Neutron
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25. (e) Valency of Oxygen
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26. Rules for writing of distribution of electrons in various shells for the first 18 elements
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27. Isotopes
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28. 2.Covalency
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29. Covalency of Oxygen
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30. (a) Covalency of Hydrogen
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31. Bohr's Model Of The Atom
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32. Discovery Of Electron
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33. Rutherford's Model Of The Atom
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34. 2.Isotopes of Carbon.
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35. Atomic Number
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36. The Physical Properties of the Isotopes of an Element are Different
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37. (a) Valency of Sodium
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38. Charged Particles in Matter
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39. All the Isotopes of an Element Have Identical Chemical Properties
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40. Discovery of Proton
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41. Valaency Of Elements
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42. Relationship Between Mass Number and Atomic Number
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43. (f) Valency of Nitrogen
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44. Valaence Electrons (Or Valancy Electrons)
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45. Electronic Configurations of Noble Gases (or Inert Gases)
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46. Covalency of Chlorine
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47. Cause of Chemical Combination
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48. Reason for the Fractional Atomic Masses of Elements
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49. Applications of Radioactive Isotopes
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50. Relation Between Valency and Valence Electrons
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