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11th CBSE
IMPORTANT
Earn 100

The atomic number of cerium (Ce) is 58. The correct electronic configuration of Ce3+ ion is

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Important Questions on Classification of Elements and Periodicity in Properties

EASY
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 15
The element with atomic number 113 has recently been discovered. Its electronic configuration is similar to that of
HARD
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 16
An element with atomic number 106 has been discovered recently. Which of the following electronic configurations will it possess?
EASY
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 17
The element Z=114 has been discovered recently. It will belong to which of the following family/ group and electronic configuration?
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 18
The element with atomic number 117 if discovered would be placed in
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 19
Which of the following pairs contain metalloid elements in the periodic table ?
HARD
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 20
Among the elements from atomic number 1 to 36, the number of elements which have an unpaired electron in the s-subshell is
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 21
 The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following?
HARD
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 22
The atom of the smallest atomic radius among the following is