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what is -ve electron gain enthalpy??

what is -ve electron gain enthalpy??

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear samidha,

Electron gain enthalpy generally becomes more negative across a period as we move
from left to right. Within a group, electron gain enthalpy becomes less negative down
a group. However, adding an electron to the 2p-orbital leads to greater repulsion
than adding an electron to the larger 3p-orbital. Hence the element with most negative electron gain enthalpy is chlorine; the one with the least negative electron gain enthalpy is phosphorus.
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