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CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why the separation of actonoids are very difficult
Asked by asikmostafamondal8
2nd May 2021,
9:08 AM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why lanthanide show high oxidation state than actinide
Asked by ndevi1234
11th March 2019,
5:30 AM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why 5F orbitals has more diffused electron than 4F orbital
Asked by ashutosh25807
7th February 2018,
5:18 AM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Write down the most common oxidation state for lanthanoids.
Asked by Topperlearning User
6th June 2016,
2:19 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Assign reasons for the following: (i)Copper (I) ion is not known in aqueous solution. (ii)Actinoids exhibit greater range of oxidation states than Lanthanoids.
Asked by Topperlearning User
6th June 2016,
2:16 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
lanthanum and lutetium do not showm coloration in solution
Asked by Hena
25th December 2015,
10:42 AM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Q. Justify the name lanthanoids and actinoids & why actinoid contraction is greater than lanthanoid contraction?
PLEASE REPLY FAST.
Asked by mohitsharma26.mks
24th February 2015,
6:08 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why is +3 oxidation state most stable in lanthamoids?
Asked by aaa
29th November 2014,
7:53 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
How would you account for the following: i. Many of the transition elements and their compounds can act as good catalysts. ii. The metallic radii of the third (5d) series of transition elements are virtually the same as those of the corresponding members of the second series. iii. There is a greater range of oxidation states among the actinoids than among the lanthanoids.
Asked by Topperlearning User
27th June 2014,
5:21 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Write a note on the Ionisation Enthalpy for lanthanoids.
Asked by Topperlearning User
27th June 2014,
3:45 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Give a note on the chemical reaction of lanthanoids.
Asked by Topperlearning User
27th June 2014,
3:42 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
What is mischmetall and what is its use?
Asked by Topperlearning User
27th June 2014,
3:34 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Write down the number of electrons in 4f, 5d and 6s orbital of Ce in +4 oxidation state.
Asked by Topperlearning User
27th June 2014,
2:42 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Write the electronic configuration of the following elements of lanthanoid and their possible oxidation state other than +3: (a) Eu and (b) Yb.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why it is very difficult to study the chemistry of Actinoid?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why Ce4+ behaves as good oxidising agent although being a stable species?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Write down the outer electronic configuration of Uranium.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
Why do Zr and Hf occur together in nature?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
actinoid contraction
Asked by
28th February 2008,
12:43 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
f-block
Asked by
28th February 2008,
12:41 PM
CBSE - XII Science - Chemistry - The d-Block and f-Block Elements
why is actinoid contraction greater than lanthanoid contraction?
Asked by
25th February 2008,
1:47 PM
