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Write the name and atomic number of the ...

Write the name and atomic number of the following elements
(i) The first halogen
(ii) The third alkali metal
(iii) The fourth alkaline earth metals
(iv) The sixth element of the second transition series
(v) The second inner transition element
(vi) The fifth noble gas.

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(i) Fluorine ,F (Z=9)
(ii) Potassium , K (Z=19)
(iii) Strontium ,Sr (Z=38)
(iv) Ruthenium ,Ru (Z=44)
(v) Praseodymium ,Pr (Z=59)
(vi) Xenon , Xe (z=54)
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. What are inner transition elements ?

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  2. In terms of electronic configuration what does elements of given peri...

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  3. Write the name and atomic number of the following elements (i) Th...

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  4. First ionisation potential of C- atom is greater than that of B atom ,...

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  5. Atomic number of elements X,Y,Z and A are 4,8,7 and 12 respectivity ....

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  6. Which has the stable electronic configuration : Ni^(2+)orFe^(+3). Wh...

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  7. Define covalent radius.

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  8. Define periodicity.

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  9. Out of Na and Mg , which has higher second ionisation energy?

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  10. Noble gases have maximum ionisation energy. Justify.

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  11. Which of the following species will have the largest and smallest siz...

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  12. The size of Cl^(-)=1.81ÅandCl=0.99Å. Explain.

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  13. How does the shielding effect caused by inner electrons affect the ion...

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  14. Larger the size of the atom ,lesser is the ionisation energy . Explain...

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  15. Define lonization enthalpy.

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  16. Noble gases have almost zero electron affinity give reason.

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  17. Which among the halogens would you expect to have the least electroneg...

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  18. Arrange the following elements in the increasing order of non - metall...

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  19. Give reason for the following statement. Halogens act as good oxidisin...

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  20. Write notes on triads and periods.

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