Characteristics of an Electron
The two important characteristics of an electron are its mass and charge.These are described below.
1.Mass of an Electron. The mass of an electron is about of the mass of hydrogen atom (which is the atom of lowest mass). Since the mass of a hydrogen atom is 1 u,we can say that the relative mass of an electron is u.The absolute mass of an electron is, however, gram.The mass of an electron is so small that it is considered to be negligible. This is why the mass of electrons is ignored while calculating the atomic mass of an element.
2.Charge of an Electron. The absolute charge on an electron is coulomb of negative charge.Now, coulomb has been found to be the smallest negative charge carried by any particle.So,this is taken as the unit of negative charge. This means that an electron has 1 unit of negative charge. In other words,the relative charge of an electron is, -1 (minus one).
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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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16. 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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