Radioactive Isotopes
There are two types of isotopes : those which are stable and those which are unstable.The isotopes which are unstable (due to the presence of extra neutrons in their nuclei) and emit various types of radiations, are called radioactive isotopes (or just radioisotopes).The radiations (such as alpha particles,beta particles and gamma rays) are emitted by the unstable nuclei of the raciioactive isotopes. Some of the common radioactive isotopes are : Carbon-14, Arsenic-74, Sodium-24,Iodine-131,Cobalt-60 and Uranium-235.The high energy radiations emitted by radioactive isotopes are harmful to human beings.So,radioactive isotopes have to be used very, very carefully by taking suitable precautions and at proper concentrations to avoid damage.
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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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5. Structure of The Atom - Study Points
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10. Arrangement Of Electrons In The Atoms
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13. Limitations of Rutherford's model of the atom
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15. All about Names of the Chemical Elements
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17. How to learn naming Chemical Formulae?
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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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26. Rules for writing of distribution of electrons in various shells for the first 18 elements
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36. The Physical Properties of the Isotopes of an Element are Different
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39. All the Isotopes of an Element Have Identical Chemical Properties
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42. Relationship Between Mass Number and Atomic Number
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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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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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