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What do you think would be the observati...

What do you think would be the observation if the `alpha`-particle scattering experiment is carried out using a foil of a metal other than gold ?

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(i) If the foil of a heavy metal like platinum (having a very heavy nucleus) is used, then the observations in the `alpha`-particle scattering experiment would be the same as that in the gold foil experiment
(ii) If, however, the foil of a right metal like lithium (having a very light nucleus) is used, then the fast moving heavy `alpha`-particles may even push the light nucleus aside and may not be deflected back.
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. On the basis of Rutherford’s model of an atom, which sub- atomic parti...

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  2. Draw a sketch of Bohr’s model of an atom with three shells.

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  3. What do you think would be the observation if the alpha-particle scatt...

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  4. Name the three sub-atomic particles of an atom.

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  5. Helium atom has an atomic mass of 4u and two protons in its nucleus. H...

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  6. If K and L shells of an atom are full, then what would be the total nu...

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  7. How will you find the valency of chlorine, sulphur and magnesium ?

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  8. If number of electrons in an atom is 8 and number of protons is also 8...

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  9. With the help of Table given below, find out the mass numbers of oxyge...

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  10. For the symbol H,D and T tabulate three sub-atomic particles found in ...

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  11. Write the electronic configuration of any one pair of isotopes and iso...

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  12. Compare the properties of electrons, protons and neutrons.

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  13. What are the limitations of J.J. Thomson’s model of the atom?

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  14. What are the limitations of Rutherford's model of the atom ?

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  15. Describe Bohr's model of the atom.

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  16. Compare all the proposed models of an atom given in this chapter.

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  17. Summarise the rules for writing of distribution of electrons in variou...

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  18. Define valency by taking examples of silicon and oxygen.

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  19. Explain with examples (i) Atomic number (ii) Mass number (iii) Isotope...

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  20. Na^(+) has completely filled K and L shells. Explain.

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