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For a element, the value of electron gai...

For a element, the value of electron gain enthalpy is positive. Which type of element it may be ? What this value is positive ?

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BEYOND PUBLICATION-CLASSIFICATION OF ELEMENTS THE PERIODIC TABLE-EXERCISE
  1. Which period starts with M main shell? Name the sub-shells in it? How ...

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  2. Which is easy to remove electron between the element having electronic...

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  3. For a element, the value of electron gain enthalpy is positive. Which ...

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  4. Element with electronic configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4...

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  5. The element with atomic number 7 is found in

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  6. Moseley calculated the number of positive charges in the atoms by anal...

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  7. Elements with electronic configuration ns^1 and ns^2 are called

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  8. Atomic weight =

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  9. No. of groups in modern periodic table................

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  10. According to Mulliken, electronegativity =

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  11. Elements from ^(58)Ce to ^(71)Lu are called

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  12. Correct order of size

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  13. Electron affinity of Fluorine is less than that of Chlorine because

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  14. In dobereiner triad, the atomic weight of middle element is :

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  15. Which of the following relation is correct ?

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  16. 5f elements are called............

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  17. Periodicity is observed in periodic table due to reappearance of simil...

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  18. The formula of oxides and chloride of Eka-Silicon is

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  19. Which block the element having 1s^2 2s^2 2p^4 beongs to ?Why ?

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  20. Which elements are called p-block elements ?

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