Which statement is incorrect with reference to inner transition elements?
- AThe oxides of lanthanoids are basic.
- B$Pm$ is a radioactive element among actinoids.
- CThe values of ionisation enthalpy of actinoids are less than the values of ionisation enthalpy of lanthanoids.
- DOnly in the electronic configuration of lanthanoids like $Ce, Gd, Lu$ the electrons are filled in $5d$ orbitals.
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Similar Questions
Which of the following elements have half-filled $f$-orbitals in their ground state?
(Given: atomic number $Sm = 62$; $Eu = 63$; $Tb = 65$; $Gd = 64$; $Pm = 61$)
$A.$ $Sm$ $B.$ $Eu$ $C.$ $Tb$ $D.$ $Gd$ $E.$ $Pm$
Choose the correct answer from the options given below:
(Given: atomic number $Sm = 62$; $Eu = 63$; $Tb = 65$; $Gd = 64$; $Pm = 61$)
$A.$ $Sm$ $B.$ $Eu$ $C.$ $Tb$ $D.$ $Gd$ $E.$ $Pm$
Choose the correct answer from the options given below:
In which of the following properties do $Lanthanoids$ and $Actinoids$ show similarity?
Easy
View SolutionWhat are the formulae of the compounds formed when lanthanoids $(Ln)$ react with nitrogen and halogen respectively?
The number of elements from the following that do not belong to lanthanoids is:
$Eu, Cm, Er, Tb, Yb$ and $Lu$
$Eu, Cm, Er, Tb, Yb$ and $Lu$
Assertion : Magnetic moment values of actinides are lesser than the theoretically predicted values.
Reason : Actinide elements are strongly paramagnetic.
Reason : Actinide elements are strongly paramagnetic.
MediumAIIMS 2013
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