Request a call back

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

CBSE Class 12-science Answered

f-block
Asked by | 28 Feb, 2008, 12:41: PM
Expert Answer
why are f-block elements called inner- transition elements?Differentiate between lanthanoids and actinoids? Discuss the trend of ionic size and oxidation states in actinoids? (plz. Answer them, don’t tell me to refer

f-block elements called inner- transition elements as they have n-2 orbital incomplete. electronic configuration is 5f in complete and 7s filled.  There is a steady decrease in the atomic and ionic radii M3+as the atomic number increases. This contraction in size is quite regular which is called actinoid contraction.) Lanthanoids mainly exhibit +3 oxidation state. In addition, they show lower oxidation state of +2 and higher oxidation state of +4. Actinoids also exhibit +3 oxidation state. In addition, they show a wide range of higher oxidation states from +4 to +7. This is due to comparable energies of 5f, 6d and 7s orbitals in actinoids.                                                                   

Answered by | 20 Dec, 2017, 04:08: PM
CBSE 12-science - Chemistry
Asked by asikmostafamondal8 | 02 May, 2021, 09:08: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by ndevi1234 | 11 Mar, 2019, 05:30: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 06 Jun, 2016, 02:19: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 27 Jun, 2014, 02:42: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 27 Jun, 2014, 03:34: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
Get FREE Sample Mock Papers for Final Exams
Download Now
×