The general horizontal trend is that electron gain enthalpies become more negative (more enegry is released as an extra electron is added) from group `1A` through group `VII A` for a given period. Exceptions occur at the_________and________elements.A. `IIA`and`VA`B. `IIA`and`VIA`C. `IIIA`and`VA`D. `IIA`and`IVA`

The general horizontal trend is that electron gain enthalpies become m

1.	The general horizontal trend is that electron gain enthalpies become more negative (more enegry is released as an extra electron is added) from group `1A` through group `VII A` for a given period. Exceptions occur at the_________and________elements.A. `IIA`and`VA`B. `IIA`and`VIA`C. `IIIA`and`VA`D. `IIA`and`IVA`
Answer» Correct Answer - A Elements of group `IIA` and `VA` have relatively stable outerlectron configuration `ns^(2)` and `ns^(2)np^(6)`, respectively.

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The general horizontal trend is that electron gain enthalpies become more negative (more enegry is released as an extra electron is added) from group `1A` through group `VII A` for a given period. Exceptions occur at the_andelements.A. `IIA`and`VA`B. `IIA`and`VIA`C. `IIIA`and`VA`D. `IIA`and`IVA`

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