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If the highest oxidation states shown by any Lanthanoid and any Actinoid are +X and +Y, the sum of X+Y is equal to?

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Important Questions on The d- and f-Block Elements

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
What is the most common oxidation state of the Actinoids? 
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Explain the position of actinoids in the periodic table. What is the action of sulphur on lanthanoids? Calculate the magnetic moment of divalent ion in aqueous solution if its atomic number is 24.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Cerium (Ce) exhibits +4 oxidation state. Give reason.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Which among the following actinoids does not have stable electronic configuration
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Which of the following statements are correct?
A) The separation of actinoid elements from each other is difficult.
B) The covalency of the compounds of actinoid metals decrease from left to right along actinoid series.
C) The compounds of Lawrencium are most covalent.
D) U and Th occur naturally in substantial quantities.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
The reason for greater range of oxidation states in actinoids is attributed to
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
In lanthanides, with increase in atomic number atomic radius decreases, except for the element X¯. What is X¯ ?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Give reason for actinides show irregularities in their electronic configuration.

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
The highest possible oxidation states of uranium and plutonium, respectively, are
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
The maximum number of possible oxidation states of actinoids are shown by:
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
The number of unpaired electrons in the uranium U92 atom is
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Give reason: Actinoid contraction is greater from element to element than lanthanoid contraction.

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Describe the reactivity of actinoids.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Compare two properties of Lanthanoids and Actinoids.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Which of the following radioactive element is used in the treatment of cancer?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Which atomic species cannot be used as a nuclear fuel?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : Size of Bk3+ ion is less than Np3+ ion.

Reason R : The above is a consequence of the lanthanide contraction.

In the light of the above statements, choose the correct answer from the options given below :

MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
The number of f electrons in the ground state electronic configuration of Np(Z=93) is ______ .(Integer answer)
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids
Which one of the following actinoid has no electron in 6d orbital?