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The d- and f-Block Elements
Lanthanoids and Actinoids – Properties
1 question from 1 paper, each with its answer.
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- of The d- and f-Block Elements
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Concepts tested
- colour and properties of f-block ions
All Questions
2021 1 question
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The incorrect statement among the following is:Most of the trivalent lanthanoid ions are coloured in the solid state (due to f-f transitions), not colourless – so this statement is incorrect. (Lanthanoids are good conductors of heat and electricity, actinoids are highly reactive especially when finely divided, and actinoid contraction is greater from element to element than lanthanoid contraction – all correct.)