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Give reason why elemental nitrogen exits...

Give reason why elemental nitrogen exitsts as diatomic molecule whereas elemental phosphours is a tetraatomic molecule.

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A, B, C, D
In the form of elemental nitrogen it exists as a diatmic molecule `(N_(2))`.This is due to the fact that nitrogen can form `ppi-ppi` multiple bond (N=N) because of small size of nitrogen atom. Heavier elements of this group do not able to form `ppi-ppi` bonds as their atomic orbitals are so large and diffuse that they cannot have effective overlapping. Further P-P single bond is stronger thatn N-N single bond. Hence phosphorus as tendency to under go catenation.
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Give reason, why elemental nitrogen exists as a diatomic molecule, whereas elemental phosphorus is a tetratomic molecule.

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Knowledge Check

  • A diatomic molecules has

    A
    1 degree of freedom
    B
    3 degrees of freedom
    C
    5 degree of freedom
    D
    6 degrees of freedom

  • Assertion : Elemental nitrogen exist as a diatomic molecule and phospours as tetratomic molecule. Reason :Nitrogen does not have vacant d-orbital wheras phosphorus have vacant d-orbital.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If assertion is false but reason is true.

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