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Ionization enthalpy and electron gain enthalpy …

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Ionization enthalpy and electron gain enthalpy of group 17 elements

Posted by Dgf Chd 4 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 4 years ago

Electron gain enthalpy:

Along period it is more negative because of attraction towards electron as of increased nuclear charge.
Down the group electron gain enthalpy keeps on becoming less negative because nuclear charge decreases and size.
So, the group 17 has highest electron gain enthalpy due to smallest size in periodic table.
Please note that: Fluorine has less electron gain enthalpy than chlorine because due to small size of oxygen the incoming electron suffers repulsion therefore, electron gain enthalpy is less negative as compared to chlorine.

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