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Which of the following will have the highest value of electron affinity
  • a)
    F
  • b)
    Cl
  • c)
    Br
  • d)
    I
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following will have the highest value of electron affinit...
Electron affinity is the energy change that occurs when an electron is added to a neutral atom. In general, electron affinity increases from left to right across the periodic table and decreases down a group.
Although Fluorine (F) is more electronegative, it has a smaller atomic radius than Chlorine (Cl), meaning that any added electron would be closer to the nucleus and more strongly attracted to it. But, the size of the 2p orbitals in Fluorine is so small that it results in electron-electron repulsion. This makes it hard for Fluorine to accommodate an extra electron.
On the other hand, Chlorine (Cl) has a larger atomic radius and its 3p orbitals are larger than the 2p orbitals of Fluorine, which reduces the electron-electron repulsion. Therefore, Chlorine can accommodate an extra electron more comfortably than Fluorine.
This makes Chlorine (Cl) have a higher electron affinity than Fluorine (F), Bromine (Br), and Iodine (I). So, the correct answer is Chlorine (Cl).
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Which of the following will have the highest value of electron affinitya)Fb)Clc)Brd)ICorrect answer is option 'B'. Can you explain this answer?
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