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What is the basic theme of organisation ...

What is the basic theme of organisation in the periodic table?

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The basic theme of organisation of elements in the periodic table is to simplify and systematize the study of the properties of all the elements and millions of their compound . On the basis of similarities in chemical properties , the various elements have now been divided into different groups . This has made the study simple because the properties of elements are now studied in form of groups rather than individually.
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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT (Questions and exercise )( NCERT EXERCISES)
  1. What is the basic theme of organisation in the periodic table?

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  2. Which important property did Mendeleev use to classify the elements in...

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  3. What is the basic difference in approach between the Mendellev's perid...

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  4. On the basis of quantum number, justify that the sixth period o...

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  5. In terms of period and group where would you locate the element with Z...

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  6. Write the atomic number of the element present in the third period and...

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  7. Which element do you think would have been named by (a) Lawrence Berke...

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  8. Why do elements in the same group have similar physical and chemical p...

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  9. What do atomic radius and ionic radius really mean to you?

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  10. How do atomic radii vary in a period and in a group ? How do you...

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  11. What do you understand by isoelectronic species ? Name a species that ...

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  12. Consider the following species: N^(3-),O^(2-),F^(ө),Na^(o+),Mg^(2+) ...

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  13. Explain why cations are smaller and anions larger in radii than their ...

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  14. What is the significance of the terms-'isolated gaseous atom' and 'gro...

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  15. Energy of an electron in the ground state of the hydrogen atom is -2.1...

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  16. Among the second period elements the actual ionisation enthalpies are ...

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  17. How would you explain the fact that the first ionisation enthalpy of s...

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  18. What are the various factors due to which the ionisation enthalpy of t...

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  19. The first ionization enthalpy values (in Kj mol^(-1)) of group 1...

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  20. Which of the following pairs of elements would have a negative e...

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