Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 17

EASY

11th CBSE

IMPORTANT

Earn 100

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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Important Questions on Classification of Elements and Periodicity in Properties

HARD

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

HARD

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 ?

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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

{Fe}^{2 +} (Z = 26)

is not equal to the number of electrons in which one of the following?

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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

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 23

Among the elements

Ca, Mg, P

and

Cl

, the order of increasing atomic radii 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 24

Identify the wrong statement in the following :

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>Competition Focus>Q 25

The ionic radii (in

A^{°}

) of

N^{3 -}, O^{2 -}

and

F^{-}

are respectively