MCQ
Which of the following exhibits only $+ 3$ oxidation state ?
- A$U$
- B$Th$
- ✓$Ac$
- D$Pa$
✓
Answer
Correct option: C.
$Ac$
c
Actinium : Atomic No $= 89$
Actinium : Atomic No $= 89$
Configuration $=[\mathrm{Rn}] 6 \mathrm{d}^{17} \mathrm{s}^{2}$
stable oxidation state $\Rightarrow+3$
$\mathrm{Th}=+3,\,+4$
$\mathrm{Pa}=+3,\,+4,\,+5$
$U=+3,\,+4,\,+5,\,+6$
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