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If K and L shells of an atom are full, t...

If K and L shells of an atom are full, then what would be the total number of electrons in the atom ?

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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. Name the three sub-atomic particles of an atom.

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

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

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

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

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

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

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

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

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

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

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  12. Describe Bohr's model of the atom.

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

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

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

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

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

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  18. Bromine occurs in nature mainly in the form of two isotopes Br(35)^(79...

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  19. A sample of an element X contains two isotopes .(8)^(16)X and .(8)^(18...

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  20. If Z = 3, what would be the valency of the element? Also, name the ele...

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