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Which of the following factors may be re...

Which of the following factors may be regarded as the main cause of lanthanide contraction ?

A

poor shielding of one of 4f electron by another in the subshell

B

effective shielding of one of 4f electrons by another in the subshell

C

poorer shielding of 5d electrons by 4f electrons

D

greater shielding of 5d electrons by 4f electrons

Text Solution

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The correct Answer is:
A C
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  9. The correct order of electron gain enthalpy with negative sign of F.Cl...

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  11. The increasing order of the ionic radii of the given isoelectronic spe...

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  12. Which of the following paramagnetic ions would exhibit a magnetic mome...

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  13. The electrons identified by the following quantum numbers n and l: (i)...

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  14. In which of the following arrangements, the sequence is not strictly a...

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  17. Given (a) n=5,m(i)=+1 (b) n=2,l=1,m(i)=-1,m(s)=-1//2 The maximum...

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