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1s^(2)2s^(2)2p^(6)3s^(2) is the electron...

`1s^(2)2s^(2)2p^(6)3s^(2)` is the electronic configuration of the metal

A

`Na `

B

`Mg`

C

`Fe`

D

`Al`

Text Solution

Verified by Experts

The correct Answer is:
B
On equating number of `e^(-)` atomic no,is 12 which is for mg.
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Knowledge Check

  • 1s^(2)2s^(2)2p^(6) is the electron configuration of

    A
    Nitrogen
    B
    Boron
    C
    Argon
    D
    Neon

  • 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(5) is not the electron configuration of

    A
    `Mn^(3+)`
    B
    `Fe^(3+)`
    C
    `Cr^(+)`
    D
    `Co^(4+)`

  • For an element , with the electrons configuration 1s^(2)2s^(2)2p^(6)3s^(2) one of the 3s electrons will be shielded from nucleas change most effectively by A ,

    A
    1s electron
    B
    2s electron
    C
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    D
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