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What are representative elements?...

What are representative elements?

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s- block and p- block (Groups 13-18) elements are collectively called representative elements or Main Group Elements.
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. How many elements can be accommodated in the long form of the periodic...

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  2. Name the p block elements that exist as liquids at room temperature.

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  3. What are representative elements?

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  4. What are metalloids ? Give example.

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  5. The number of elements in the first period is only 2. Give reason.

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

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

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

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  9. Why are noble gases chemically inert?

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

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

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  12. What are inner transition elements ?

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

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

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

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

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

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  18. Define covalent radius.

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  19. Define periodicity.

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

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