The electron affinity values of elements A, B, C and D are respectively –15, – 121, +31 and
- 142 kJ mol-1 The element 'C' is
(A) Boron
(B) Carbon
(C) Nitrogen
(D) Oxygen
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Answer:
The correct answer is Oxygen..
Explanation:
We are given three EA's where for the first and second EA we don't need to provide energy to add electrons but in the third EA we need to provide energy....
Which states that after gaining two electrons the element must have attained a noble gas configuration...
Which is clear in the case of Oxygen..
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