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Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species
  • a)
    S < o="" />< cl="" />< />
  • b)
    Cl < f="" />< s="" />< />
  • c)
    F < cl="" />< o="" />< />
  • d)
    O < s="" />< f="" />< />
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which one of the following arrangements represents the correct order ...

Electron Gain Enthalpy of Atomic Species

Explanation:

Definition:
Electron gain enthalpy is the energy released when a neutral atom gains an electron to form a negative ion.

Arrangement of Electron Gain Enthalpy:
The electron gain enthalpy becomes more negative (i.e., more exothermic) as we move across a period from left to right and up a group from bottom to top.

Arrangement of Atomic Species:
- Option a) S (Sulfur)
- Option b) Cl (Chlorine)
- Option c) F (Fluorine)
- Option d) O (Oxygen)

Correct Order:
The correct order of electron gain enthalpy (with negative sign) of the given atomic species is:
1. O (Oxygen) - has the highest electron gain enthalpy among the given options
2. F (Fluorine)
3. Cl (Chlorine)
4. S (Sulfur)

Therefore, option 'D' (O) represents the correct order of electron gain enthalpy.
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Community Answer
Which one of the following arrangements represents the correct order ...
Cl-atom has the highest electron affinity in the periodic table. F being a member of group 17 has higher electron gain enthalpy than S which belongs to group 16 . This in turn is higher than the electron affinity of O -atom. Thus, Cl > F > S > O
It is worth noting that the electron gain enthalpy of oxygen and fluorine, the members of the second period, have less negative values than the elements sulphur and chlorine of the third period.
This is due to small size of the atoms of oxygen and fluorine. As a result, there is a strong interelectronic repulsion when extra electron is added to these atoms, i.e., electron density is high and the addition of an extra electron is not easy.
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Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic speciesa)S b)Cl c)F d)O Correct answer is option 'D'. Can you explain this answer?
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