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The 4f series of inner transition metals is called the:
ALanthanoids
BActinoids
CHalogenoids
DChalcogens
Answer & Solution
Correct answer: A. Lanthanoids
1. Two series make up the inner transition metals.
2. The 4f series runs from cerium to lutetium.
3. These are the lanthanoids.
_Source: NCERT Class 12 Chemistry Part I, Chapter 8, The d- and f-Block Elements._
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