HARDMCQ SINGLEJEE Mains ChemistryInorganic ChemistryPeriodic PropertiesAchiever Section

Second electron affinity

A.Is always negative (energy is absorbed)✓ Correct

B.Is always positive (energy is released)

C.Can be positive or negative

D.Is always zero

Explanation

Electron affinity is the amount of energy released when an electron is added to a neutral atom. But when a 2nd electron is added after the addition of 1 electron, the incoming electron will face repulsion from the electrons in the valence shells. So, we need to provide energy for the addition of the 2nd electron. Hence, energy is absorbed.

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