Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 11

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The elements from thorium (At.No. $90$ ) to lawrencium (At.No. $103$ ) in which $5 f$ energy levels are filled up are called :

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Important Questions on The d- and f-Block Elements

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 12

Select the element in the following which does not show oxidation state

+ 4

:

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 13

With increase in atomic number the ionic radii of actinides :

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 14

The general electronic configuration of lanthanide is :

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 15

Cerium can show the oxidation state of

+ 4

because

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 17

The maximum oxidation state shown by actinides is :

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 19

The most characteristic oxidation state of lanthanoids is :

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 20

The most common oxidation state of actinoids is

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Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 21

Which of the following

f -

block elements, will change its group on emitting

α -

particle (alpha particle) :
(

1

)

{}_{58}{Ce}

(

2

)

{}_{70}{Lu}

(

3

)

{}_{90}{Th}

(

4

)

{}_{92}U

Correct answer is :-