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    Hi

    I am currently stuck with this question, is there any chance someone could help please?

    The Ionisation energy of hydrogen is 13.6 eV.
    A. What is the speed of the slowest electron that can ionise a hydrogen atom when it collides with it?
    B What is the longest wavelength of electromagnetic radiation that could produce ionisation in hydrogen?

    Thanks in advance

    birch1
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    (Original post by birch1)
    Hi

    I am currently stuck with this question, is there any chance someone could help please?

    The Ionisation energy of hydrogen is 13.6 eV.
    A. What is the speed of the slowest electron that can ionise a hydrogen atom when it collides with it?
    B What is the longest wavelength of electromagnetic radiation that could produce ionisation in hydrogen?

    Thanks in advance

    birch1
    (a) use kinetic energy and rearrange for v
    (b) use de brogile equation


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    Thanks for that kingaaran
 
 
 
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