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State modern periodic law. How many grou...

State modern periodic law. How many groups and periods are present in the long form of the periodic table?

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Modern periodic law- The physical and chemical properties of elements are periodic functions of their atomic numbers.
`rarr` In odern periodic table 7 periods and 18 groups are present.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Short Answer Questions
  1. On the basis of quantum numbers, justify that the 6^(th) period of the...

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  2. How did Mosley's work on atomic number show that atomic number is a fu...

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  3. State modern periodic law. How many groups and periods are present in ...

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  4. Why f-block elements are placed below the main table.

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  5. Mention the number of elements present in each of the periods in the l...

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  6. Give the outer orbit general electronic configutation of (a) Noble g...

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  7. Give any five of the characteristic properties of transition elements.

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  8. What are rare earths and transuranic elements?

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  9. What is isoelectronic series? Name a series that will be isoelectronic...

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  10. What is isoelectronic series? Name a series that will be isoelectronic...

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  11. What is isoelectronic series? Name a series that will be isoelectronic...

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  12. What is isoelectronic series? Name a series that will be isoelectronic...

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  13. Explain why cation is smaller and anion is larger in radii than their ...

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  14. Arrange the second period elements in the increasing order of their fi...

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  15. IE(1) of Na is less than that of Mg but IE(2) of Na is higher than tha...

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  16. What are the various factors due to which the IE of the main group ...

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  17. The first ionization enthalpy values (in kJ mol^(-1)) of group 13 elem...

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  18. Would you expect the second electron gain enthalpy of oxygen as positi...

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  19. What is the basic difference between the electron gain enthalpy and el...

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  20. Would you expect IE(1) for two isotopes of the same element to be the ...

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