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With the help of Table given below, find...

With the help of Table given below, find out the mass numbers of oxygen and sulphur atoms :

Text Solution

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(i) Mass number of oxygen = No. of protons + No. of neutrons
`= 8 +8`
`=16`
(ii) Mass number of sulphur = No. of protons + No. of neutrons
`= 16 + 16`
`= 32`.
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. How will you find the valency of chlorine, sulphur and magnesium ?

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

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

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

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

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

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

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

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  9. Describe Bohr's model of the atom.

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

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

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

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

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

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

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

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

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  18. Composition of the nuclei of two atomic species X and Y is given as un...

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  19. For the following statements, write T for true and F for false : (a)...

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  20. Rutherford's alpha particle scattering experiment led to the discovery...

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