JEE Main · 2019 · 10 Apr 2019 · Shift 2 · d and f Block Elements

The highest possible oxidation states of uranium and plutonium, respectively, are

Answer: (D)

Solution

Among the early actinides the metals reach high oxidation states by using their loosely held

5 f

and

6 d

electrons. Uranium tops out at

+ 6

, the state of the uranyl ion

UO X_{2} X^{2 +}

and of

UF X_{6}

. Plutonium can be coaxed one step further, to a rare

+ 7

. The highest states are thus

6

for uranium and

7

for plutonium.

JEE Main · 2019 · 10 Apr 2019 · Shift 2 · Single correct option