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Which of the following configurations re...

Which of the following configurations represents the `s-block` element?

A

`[Ar]3d^(10)Rs^(1)`

B

`[Ne]^(3s^(2)3p^(1)`

C

`[He]2s^(2)2p^(6)3s^(1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
The block of an element depends on the type of shell which receies the last electron.As last enters in s-subshell of ourtermost shell according Aufbau rule, the element of option © beongs s-block.
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Knowledge Check

  • Which of the following configurations represents the most electronegative element?

    A
    `1s^(2)2s^(2)2p^(6)3s^(1)`
    B
    `1s^(2)2s^(2)2p^(5)`
    C
    `1s^(2)2s^(2)2p^(6)3s^(2)3p^(5)`
    D
    `1s^(2)2s^(2)2p^(4)`

  • which of the following configurations represents atoms of the elements having the higest second ionisation energy?

    A
    `1s^(2)2s^(2)2p^(4)`
    B
    `1s^(2)2s^(2)2p^(6)`
    C
    `1s^(2)2s^(2)2p^(6)3s^(1)`
    D
    `1s^(2)2s^(2)2p^(6)3s^(2)`

  • Which of the following configuration represents atom of the element having the highest second ionization potential ?

    A
    ` 1s^(2) 2 s^(2) 2p^(4)`
    B
    `1 s^(2) 2s^(2) 2p^(6)`
    C
    `1 s^(2) 2s^(2) 2p^(6) 3s^(1)`
    D
    `1s^(2) 2s^(2) 2p^(6) 3s^(2)`

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    Which of the following electronic configuration represents a sudden large gap between the values of second and third ionisation energies of an element?

    Which of the following statement is NOT true bout 's' block elements ?

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