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    Hi this may be a silly question but I have done GCSE science but was wondering . How can you get a single molecule of hydrogen as it doesn't have a full outer shell of electrons. Does it bond contently to another hydrogen??
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    (Original post by JackLeggett)
    Hi this may be a silly question but I have done GCSE science but was wondering . How can you get a single molecule of hydrogen as it doesn't have a full outer shell of electrons. Does it bond contently to another hydrogen??
    Your question doesn't make sense. A single molecule of hydrogen does have a full shell, because the 2 hydrogen atoms will covalently bond and share a pair of electrons to give a full shell. Hydrogen itself exists naturally as a diatomic molecule, so if you had pure hydrogen, it would consist of molecules, not atoms.

    Now, if you wanted pure hydrogen, you could liquify hydrogen gas in the air (and at the same time you would liquify O2, N2 and CO2 too) then, use distillation to separate the gases based on boiling point. However, this is theoretical, and I'm not sure how a fractionating column would work at such cold temperatures.

    In practice, you would electrolyse water, but you can google it yourself, since it would take quite a lot of explaining


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