In whichcase, effectivenuclearcharge isminimum ?

1.	In whichcase, effectivenuclearcharge isminimum ?
Answer» `Be ` `Be^(2+)` `Be^(3+)` all havethe sameeffectivenuclearcharge SOLUTION :Higher THENUMBEROF electronsin the extranuclearpart (Be has 4, `Be^(2+) ` has 2 while `Be^(3+)` has 1 )loweris theforceof attraction of the nucleuson thevalenceelectrons and henceloweris theeffectivenuclearcharge. ThusBe hasminimum effectivenuclearchargei.e.,option (a)is correct.

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