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Can phosphorus form PH(5) with its outer...

Can phosphorus form `PH_(5)` with its outer electronic configuration of `3s^(2)3p^(3)`?

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Phosphorus cannot form `PH_(5)` although it shows +3 and +5 oxidation states. Dihydrogen acts as a weak oxidising agent due to high bond dissociation enthalpy of H - H bond (435.88 kJ`cdot mol^(-1)`). and slightly negative electron-gain enthalpy (-73 kJ`cdot "mol"^(-1)`). So, dihydrogen can oxidise phosphorus to +3 oxidation state but not to its highest oxidation state of +5. Therefore, phosphorous can form only `PH_(3)` and not `PH_(5)`.
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Knowledge Check

  • The electronic configuration of Cr^(3+) is

    A
    [Ar] `3d^4 4s^2`
    B
    [Ar] `3d^3 4s^0`
    C
    [Ar] `3d^2 4s^1`
    D
    [Ar] `3d^5 4s^1`

  • What does the electronic configuration 1s^2 , 2s^2 , 2p^5 , 3s^1 indicate?

    A
    Ground state of fluorine
    B
    Excited state of fluroine
    C
    Excited state of neon
    D
    Excited state of the `O^(2-)` ions

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