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The electron affinities of halogens are ...

The electron affinities of halogens are `F=322, Cl=349,Be=324,I=295kJ mol^(-1)`. The higher value for `Cl` as compared to that of `F` is due to

A

Weaker electron-electron repulsion in `Cl`

B

Higher atomic radius of `F`

C

Smaller electronegativity of `F`

D

More vacant `P`-subshell in `Cl`

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The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity of first electron affinity or electron gain enthalpy. The first electron affinity is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effects (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increase as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configuration. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. The electron affinities of halogens are: F =- 332, CI =- 349, Br =- 324,I =- 295 kJ mol^(-1) The higher value of CI as compared to that of F^(-) is due to:

The electron gain enthalpies of halogens are as given below: F =- 332, CI =- 349, Br =- 324, I =- 295 kJ mol^(-1) . The less negative value for F as compared to that of CI is due to:

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A2Z-CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES-Electron Gain Enthalpy
  1. The electron affinity for the inert gases is

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  2. Which of the following element has the highest value of electron affin...

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  3. The electron affinities of halogens are F=322, Cl=349,Be=324,I=295kJ m...

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  4. Nitrogen has lower electron affinity than its preceding element carbon...

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  5. Which one of the following is an incorrect statement?

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  6. Which one of the following arrangements represents the correct order o...

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  7. Electron affinity is the lowest for

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  8. Electron affinity is the

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  9. Arrange S,O and Se in ascending order of electron affinity?

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  10. Which one of the elements has the maximum electron affinity?

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  11. The electorn affinity values for the halogens shown the following tren...

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  12. Which among the following factors is the most important in making fluo...

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  13. Which element has maximum electron affinity ?

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  14. Highest electron-affinity is associated with the configuration

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  15. Which of the following pairs show reverse properties on moving along a...

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  16. Which of the following has the least electron affinity in kJ mol^(-1)?

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  17. Which of the following properties show gradual decrease with increase ...

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  18. Fluorine has lower electron affinity than chlorine because of

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  19. For electron affinity of halongens which of the following is correct

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  20. the correct order of electron gain enthalpy with negative sign of F,Cl...

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