Transition and Inner Transition Elements — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryTransition and Inner Transition Elements2 Marks
Question
What are actinoids? Give their general electronic configuration.
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Answer
Actinoids : The series of fourteen elements from $_{90}Th$ to$ _{103}Lr$ which follow actinium $(_{89}Ac)$ and in which differentiating electrons are progressively filled in $5f-$orbitals in prepenultimate shell are called actinoids.
Their general electronic configuration is, $[R n]^{86} 5 f^{1-14} 6 d^{0-1} 7 s^2$.
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