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Lanthanoids – properties
Concepts tested here
- lanthanoid-reactivity
All Questions
2016 Phase II 1 question
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Which one of the following statements related to lanthanons is incorrect?
Lanthanoids are not all more reactive than aluminium.
Lanthanons are less reactive than aluminium due to high ionisation potential (lanthanide contraction).
$Ce^{4+}$ is a good oxidising agent and is easily converted into $Ce^{3+}$.
Eu (63) = $[Xe]4f^75d^06s^2$; $Eu^{2+} = 4f^7$
In the lanthanoid series from Ce to Lu, ionic radius decreases regularly and covalent character increases, so the basic character of hydroxides decreases.