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Among the following, total numbers of radioactive elements are:
In, Ac, At, Ba, Tc, Pm, Ta, Xe

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Important Questions on The d- and f-Block Elements

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
The reason for greater range of oxidation states in actinoids is attributed to
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
The maximum oxidation state which actinoid element can exhibit is
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Compare two properties of Lanthanoids and Actinoids.
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Write any three differences between lanthanides and actinides.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
The maximum number of possible oxidation states of actinoids are shown by:
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Give three points of difference between lanthanoids and actinoids.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids

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

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Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Give any four differences between Lanthanoids and actinoids.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Which of the following radioactive element is used in the treatment of cancer?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Which among the following elements does NOT form oxocation?
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of 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>Properties of Actinoids
The highest possible oxidation states of uranium and plutonium, respectively, are
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids

How will you account for the following?

Actinoids exhibit more number of oxidation states than lanthanoids.

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Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
More number of oxidation state are exhibited by the actinoids than by lanthanoids. The main reason for this is;
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids

Give two reasons.

The chemistry of actinoids is more complicated than Lanthanoids.

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Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Clarify the difference between Lanthanoid and Actinoid.
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Give two differences between Lanthanoids and Actinoids.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties 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 :

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Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
Which atomic species cannot be used as a nuclear fuel?
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Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Properties of Actinoids
In lanthanides, with increase in atomic number atomic radius decreases, except for the element X¯. What is X¯ ?