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Home » Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer
Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer
CBSE | Chemistry | Class 11 | Classification of Elements and Periodicity in Properties | NCERT
Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer

Answer:

Oxygen is in p block element group 16. It is the first of 16 members. It is a non-metal found in the earth’s crust.
When an electron is added to an O atom, it releases energy. O has a negative initial electron gain enthalpy.
Contrarily, when an electron is added to an oxygen ion to create an O^-2 ion, energy is required to overcome significant electrical repulsions between O and e. O has a positive second electron gain enthalpy.

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