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Mentnion two laws (for the (classificati...

Mentnion two laws (for the (classification of elements), which were proposed before mendeleev.

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(1) Doberiner's law of triands and (2) Newlands's law of octaves.
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CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION
  1. Mentnion two laws (for the (classification of elements), which were pr...

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  2. Write IUPAC name and the symbol of the element with atomic number 100.

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  3. What are the names given to eka-aluminium and eka-silicon predicted by...

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  4. mention the number of periods and groups in the long form of the perio...

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  5. Mention the name of the s-block element which is placed along with the...

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  6. To whicih groups of the long form of periodic table to the chalcogens ...

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  7. Write the general electronic configuration of innertransition elements...

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  8. Write the stomic number of the element placed just below cobalt (Z=27)...

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  9. Indicate the position of the element having electronic configuration 1...

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  10. What is the total number of elements incorporated till not in the peri...

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  11. Which group of the long form of the periodic table contains solid, liq...

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  12. Which element is the most electronegative?

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  13. Name one property which is not periodic.

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  14. Arrange according to the instructions given the in the bracker: (1) O,...

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  15. Name the elements having highest and lowest ionisation enthalpy.

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  16. What do mean by the statement-covalent radius of H-atom is 0l.37 Å?

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  17. indicate the similarity observed in the electron-gain enthalpy values ...

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  18. Why is the size F^(-) smaller tha that of O^(2-) ion?

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  19. Compare the radii of K^(+) and Cl^(-) ions (each contain the same numb...

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  20. What do you underrstand by negative value of electro-gain enthalpy of ...

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