Question
Explain in brief about the $f-$block elements.
✓
Answer
The elements present in $f-$block are all metals and are placed in the two rows called lanthanide series $(_{58}Ce \ to \ _{71}Lu)$ and actinide series $(_{90}Th \ to \ _{103}Lr).$
The lanthanides are also known as rare earth elements while the actinide elements beyond $_{92}U$ are called transuranium elements.
All the transuranium elements are manmade and radioactive.
The last electron of the elements of these series is filled in the $(n-2)f$ subshell, and therefore, these are called inner transition elements.
These elements have very similar properties within each series.
The lanthanides are also known as rare earth elements while the actinide elements beyond $_{92}U$ are called transuranium elements.
All the transuranium elements are manmade and radioactive.
The last electron of the elements of these series is filled in the $(n-2)f$ subshell, and therefore, these are called inner transition elements.
These elements have very similar properties within each series.
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