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Second electron gain enthalpy Is ͟ ...

Second electron gain enthalpy Is ͟ ͟ ͟͟͟

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Would you expect the second electron gain enthalpy O as positive, more negative or less negative than the first ? Justify your answer.

Which of the following pairs would have more negative electron gain enthalpy ? O or F

Knowing the electron gain enthalpy values for O rarr O^- and O rarr O^2- as -141 and 702 ~kJ ~mol^-1 respectively, how can you account for the formation of a large number of oxides having O^ 2- species and not O^-

Which of the following pairs would have more negative electron gain enthalpy ? F or Cl

Second electron affinity of an element

Justify the following: The electron gain enthalpy of 'F' is lower than that of 'Cl .

Electronegativity differs from electron gain enthalpy. a) Do you agree ? b) What do you mean by electronegativity?

Assertion : Noble gases have positive electron gain enthalpy. Reason : Noble gases have stable closed shell electronic configuration.

(3N_(0))/2 atoms of X_((g)) are converted into X_((g))^(+) by energy E_(1),(2N_(0))/3 atoms of X_((g)) are converted into X_((g))^(-) by energy E_(2) . Hence ionisation energy and electron gain enthalpy of X_((g)) are ( N_(0) = Avogadro Number)

MAXIMUM PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-EXAMPLE
  1. Halogen with highest ionization enthalpy is ͟ ͟ ͟͟͟

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  2. Which of the following represents the most eleciropositive element?

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  3. Second electron gain enthalpy Is ͟ ͟ ͟͟͟

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  4. Correct order of polarising power is Cs^+ , K^+ , Mg^(2+) ,Al^(3+)

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  5. The IUPAC name ofthe element with atomic number is 109 is ͟ ͟ ͟...

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  6. The size of iso electronic species F^-, Ne and Na^+ is affected by

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  7. In transition elements the incoming electron occupies (n-1)d sublevel ...

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  8. The arguments made by two students are as given: Student 1 : 'Hydrogen...

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  9. Match the following:

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  10. a) Which one has greater size, Na or K? b) Justify your answer.

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  11. The general cheracteristics of a particular block of elements is as gi...

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  12. The variation in electron gain enthalpies of elements is less systemat...

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  13. Some elementS are given. Li, Cs, Be, C, N, O F, l, Ne, Xe. a) Arrange...

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  14. a) What is meant by atomic radius? b) Explain covalent radius. c) Wr...

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  15. Consider the statement: 'The element with 1s^2 configuration belongs t...

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  16. The properties of elements are a periodic function of their atomic wei...

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  17. a) Define ionisation enthalpy. b) IE1< IE2 < IE3 What is meant by th...

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  18. Say whether the following are true or false: a) On moving across a pe...

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  19. a) On moving down a group what happens to electron gain enthalpy? b) ...

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  20. Electron gain enthalpy is an important periodic property. a) What is m...

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