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Write a note about chancourtois classifi...

Write a note about chancourtois classification .

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In this system, elements that differed from each other in atomic weight by 16 or multiples of 16 fell very nearly on the same vertical line. Elements lying directly under each other showed a definite similarity. This was the first periodic law.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(2 MARK QUESTIONS)
  1. State Johann Dobereiner's law of triads.

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  2. Write a note about chancourtois classification .

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  3. State the Newland's law of octaves.

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  4. State Mendeleev's period law.

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  5. Explain about the relationship between the atomic number of an element...

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  6. State modern periodic law.

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  7. What are the anomalies of the long form of periodic table?

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  8. Mention the names of the elements with atomic number 101 ,102,109 and ...

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  9. Write a note about the electronic configuration of elements in groups.

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  10. Give the name and electronic configuration of elements of 1^(st) group...

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  11. Write any two characteristic properties of alkali metals.

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  12. Write any two characteristic properties of alkaline earth metals.

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  13. Groups from 13 to 18 in the periodic table are called p-block elements...

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  14. Why noble gases do not show much of chemical reactivity?

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  15. Halogens and chalcogens have highly negative electron gain enthalpies....

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  16. What are d-block elements? Why are they called so?

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  17. Elements Zn, Cd and Hg with electronic configuration (n-1)d^(10) ns^(2...

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  18. Why Zn, Cd and Hg are considered as soft metals?

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

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  20. What are f-block elements? How many series are there? Why they are cal...

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