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Why do noble gases have positive electro...

Why do noble gases have positive electron gain enthalpies?

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Y. The atom X is fluorine while Y is chlorine. The atomic size of fluorine is much smaller as compared to that of chlorine
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Electron Gain Enthalpy

The element with positive electron gain enthalpy is

Which of the following noble gases has the maximum positive electron gain enthalpy? (A) It is difficult to add an electron due to small size. (B) It is difficult to add an electron due to high electronegativity. (C) It is difficult to add an electron due to stable configuration. (d) It is difficult to add an electron due to high electron affinity

Why do halogens have high electron gain enthalpies (i.e. -Delta_(eg)H^(o.)) ?

Why do halogens have maximum negative electron gain enthalpy in the respective periods of the periodic table?

Up to atomic number 19 ,if' X number elements are having positive electron gain enthalpy (EGE_(1)) and Y number of elements are having negative electron gain enthalpy (EGE_(1)) then find the value of (X)/(Y) ?

Which among the following elements will have a positive electron gain enthalpy ? B, C, N, O.

Why do noble gases have low boiling points ?

Account for the following : The acidic strength decreases in the order HCl gt H_2S gt PH_3 (ii) Tendency to form pentahalides decreases down the group 15 of the periodic table. (iii) Noble gases have large positive values of electron gain enthalpy.

Ammong the following, the element having highest ionization enthalpy as positive electron gain enthalpy is

ICSE-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-SHORT ANSWER TYPE QUESTIONS
  1. Define ionisation energy . What is its value for a hydrogen atom ?

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  2. Why is anion larger than its parent atom ?

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  3. Define valency. How does it change across a period and on going down a...

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  4. Why is the second ionisation energy of an element much greater than it...

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  5. Explain what do you understand by screening effect. How does this effe...

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  6. Arrange with explanation the following elements in the increasing orde...

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  7. Why do the alkali metals possess minimum and the noble gases maximum i...

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  8. Why is the ionisation energy of beryllium greater than that of Li and ...

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  9. Why does the ionisation energy decrease on going down a group?

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  10. Among the elements of second period pick out the element with the m...

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  11. Among the elements of second period pick out the element with the mo...

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  12. Among the elements of second period pick out the element with the l...

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  13. Among the elements of second period pick out the element that is th...

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  14. Among the elements of second period pick out the element that is the...

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  15. Why does the fourth period have eighteen and not eight elements?

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  16. The valency of a representative element is either equal to the number ...

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  17. Why do noble gases have positive electron gain enthalpies?

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  18. Two elements X and Y possess the following electronic configuration ? ...

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  19. Why do the melting points decrease in going from NaF to Nal?

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  20. Li(2)CO(3) decomposes on heating but the carbonates of other alkali me...

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