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Define modern periodic law....

Define modern periodic law.

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The modern periodic law states that , the physical and chemical properties of the elements are periodic functions of their atomic numbers,''
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-II. WRITE BRIEF ANSWER TO THE FOLLOWING QUESTIONS.
  1. Define modern periodic law.

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  2. What are isoelectronic ions ? Give examples.

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  3. What is effective nuclear charge ?

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  4. Is the definition given below for ionisation enthalphy correct ? Ion...

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  5. Magnesium loses electrons successively to form Mg^(+),Mg^(2+)andMg^(3+...

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  6. Define electronegativity .

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  7. How would you explain the fact that the second ionisation potential is...

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  8. Successive ionization energy values increase Why ?

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  9. Energy of an electron in the ground state of the hydrogen atom is -2....

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  10. The electronic configuration of atom is one of the important factor wh...

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  11. In what period and group will an element with Z=118 will be present?

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  12. Justify that the fifth period of the periodic table should have 18 el...

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  13. Elements a,b,c and d have the following electronic configurations: ...

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  14. Give the general electronic configuration of lanthanides and actides?

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  15. Why halogens act as oxidising agents?

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  16. Mention any two anomalous properties of second period elements.

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  17. Explain the pauling method for the determination os ionic radius.

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  18. Explain the periodic trend of ionisation potential.

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  19. Explain the diagonal relationship

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  20. Why the first ionisation enthalphy of sodium is lower than that of mag...

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