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Out of atoms and molecules, which can ex...

Out of atoms and molecules, which can exist independently?

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Molecules can exist independently. However, the atoms of noble gases (He, Ne, Ar, Kr, Xe) can also exist independently.
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Knowledge Check

  • A molecule which cannot exist theoretcally is :

    A
    `SF_4`
    B
    `PF_2`
    C
    `OF_4`
    D
    `O_2F_2`

  • Identify a molecule which does not exist.

    A
    `He_(2)`
    B
    `Li_(2)`
    C
    `C_(2)`
    D
    `O_(2)`

  • Identify a molecule which does not exist.

    A
    `Li_2`
    B
    `C_2`
    C
    `O_2`
    D
    `He_2`

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    Identify a molecule which does not exist.

    (a)Define atomic mass unit. How is it linked with relative atomic mass? (b) How do you know the presence of atoms if they do not exist independently for most of the elements?

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    Arrangement of atoms in molecules can be determined by

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