d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge - Page 87

Question 431

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What is a significant consequence of the similar energies of the 5f, 6d, and 7s orbitals in actinoids?

It leads to increased overall stability
It results in simpler chemical reactions
It enables the stabilization of a greater variety of oxidation states
It causes lower overall reactivity

Question 432

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Which actinoid is specifically mentioned in the text as achieving a maximum oxidation state of +7?

Plutonium (Pu)
Uranium (U)
Protactinium (Pa)
Neptunium (Np)

Question 433

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Compared to lanthanoids, what is a major distinguishing feature of actinoid oxidation states?

Actinoids only ever show the +3 state
Actinoids show fewer oxidation states than lanthanoids
Lanthanoids exhibit a wider range of oxidation states
Actinoids exhibit a significantly wider range of accessible oxidation states

Question 434

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Which electron subshell is formally filled last in the progression of the actinoid series?

6d
7s
4f
5f

Question 435

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What is a common chemical tendency observed for both +3 and +4 actinoid ions?

They are highly stable in aqueous water
They are typically colorless in solution
They do not readily form complexes
They have a tendency to undergo hydrolysis