EASY
Earn 100

Which of the following belongs to the actinides series?

80% studentsanswered this correctly

Important Questions on The d- and f-Block Elements

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The 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 :

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
Which of the following radioactive element is used in the treatment of cancer?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
Which among the following elements does NOT form oxocation?
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The 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>The Actinoids
Which among the following actinoids does not have stable electronic configuration
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The 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.
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
More number of oxidation state are exhibited by the actinoids than by lanthanoids. The main reason for this is;
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The 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>The Actinoids
The number of unpaired electrons in the uranium U92 atom is
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
The reason for greater range of oxidation states in actinoids is attributed to
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
The highest possible oxidation states of uranium and plutonium, respectively, are
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids

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

MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
The number of f electrons in the ground state electronic configuration of Np(Z=93) is ______ .(Integer answer)
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
What is the role of radioactive isotopes in the mechanism of photosynthesis in plants ?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
Compare two properties of Lanthanoids and Actinoids.
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
The maximum oxidation state which actinoid element can exhibit is
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
Which atomic species cannot be used as a nuclear fuel?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
Which one of the following actinoid has no electron in 6d orbital?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Actinoids
The maximum number of possible oxidation states of actinoids are shown by: