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Arrange the following elements in the in...

Arrange the following elements in the increasing order of metallic character: Si, Be, Mg, Na, P

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Metallic character increases down a group and decreases along a period as we move from left to right .Hence the order of increasing metallic character is `PltSiltBeltMgltNa`.
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. The number of elements in the first period is only 2. Give reason.

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  2. The elements Z=117 and 120 have not yet been discovered. In which fami...

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  3. Arrange the following elements in the increasing order of metallic cha...

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  4. Predict the periods and blocks to which each of the following elements...

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  5. Why are noble gases chemically inert?

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  6. Why d- block elements are known as transition element ?

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  7. Rn (Z=86) is the last noble gas discovered . Predict what will be the...

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  8. What are inner transition elements ?

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

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

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

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

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

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  14. Define covalent radius.

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  15. Define periodicity.

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

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  17. Noble gases have maximum ionisation energy. Justify.

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

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

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

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