Lanthanoids are
- A$14$ elements in the sixth period (atomic no. $= 58$ to $71$) that are filling $4f$ sublevel
- B$14$ elements in the seventh period (atomic no. $= 58$ to $71$) that are filling $4f$ sublevel
- C$14$ elements in the sixth period (atomic no. $= 90$ to $103$) that are filling $4f$ sublevel
- D$14$ elements in the seventh period (atomic no. $= 90$ to $103$) that are filling $4f$ sublevel
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Similar Questions
The electronic configuration of $Yb^{2+}$ is:
Easy
View Solution$A$ lanthanoid has $n$ unpaired electrons and another lanthanoid has $(14-n)$ unpaired electrons. It means:
Easy
View SolutionWhat is the effect of lanthanoid contraction in the lanthanoid series of elements with increasing atomic number?
Choose the correct option regarding the following.
Assertion: Actinides exhibit a larger number of oxidation states than lanthanides.
Reason: There is a large energy gap between $5f$,$6d$ and $7s$ sub-shells.
Assertion: Actinides exhibit a larger number of oxidation states than lanthanides.
Reason: There is a large energy gap between $5f$,$6d$ and $7s$ sub-shells.
Which one of the lanthanoids given below is the most stable in divalent form?
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