Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

why ionisation enthalpies along 3d transition series show irregular trend?
Asked by kanwal sandhu | 21 Jan, 2012, 07:41: PM
Expert Answer
The irregular trend in 3d series is due to the fact that the removal of electrons alters the relative energies of 4s and 3d orbitals.
Thus there is a reorganisation of energy accompanying ionisation which results into the release of exchange energy which increases as the number of electrons increases in the dn configuration and also from the transference of s-electrons into d-orbitals.
 
Therefore,  Chromium has low first ionization enthalpy because loss of one electron gives stable configuration (3d5), while Zinc has very high ionization enthalpy because electron has to be removed from 4s orbitals of of stable configuration (3d10 4s2)
Answered by | 22 Jan, 2012, 11:08: AM
CBSE 12-science - Chemistry
Asked by pcn.gugale | 14 Oct, 2021, 02:54: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by asikmostafamondal8 | 02 May, 2021, 09:08: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by riyagharat2020 | 22 Mar, 2021, 10:46: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by ABHILASHA | 04 Mar, 2021, 02:26: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by riaouat143 | 04 Feb, 2021, 03:15: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by vaijilulla1975 | 22 Oct, 2020, 10:16: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by ghoshmahadev037 | 20 Sep, 2020, 11:45: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by sulaikhasulu393 | 03 May, 2020, 06:18: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by mufeedatvp2000 | 20 Apr, 2020, 02:53: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by jain.pradeep | 24 Feb, 2020, 07:28: PM
ANSWERED BY EXPERT
Get FREE Sample Mock Papers for Final Exams
Download Now
×