Ionization Energy vs. Threshold energy

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JakeSaum_1A
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Ionization Energy vs. Threshold energy

Postby JakeSaum_1A » Wed Oct 28, 2020 1:27 pm

Threshold energy is the amount of energy it took to remove an electron from a metal surface in the photoelectric effect experiment. Is ionization energy the same principle as threshold energy since it's the amount of energy needed to remove an electron from an atom? Or are they two different concepts? Thanks

OwenSumter_2F
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Re: Ionization Energy vs. Threshold energy

Postby OwenSumter_2F » Wed Oct 28, 2020 1:29 pm

You can think of them conceptually the same way if that helps you visualize it, but they are two different numbers and concepts.

Janelle Gokim 3B
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Re: Ionization Energy vs. Threshold energy

Postby Janelle Gokim 3B » Wed Oct 28, 2020 1:59 pm

They are the same conceptually in that there is a certain criteria/threshold that needs to be met, however, in lecture he mentioned that while the photoelectric effect involves the removal of an electron from a solid metal, ionization energy would be the removal of an electron from an atom/metal in the gas state.

EnricoArambulo3H
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Re: Ionization Energy vs. Threshold energy

Postby EnricoArambulo3H » Wed Oct 28, 2020 2:10 pm

They are similar in that both of them involve energies reaching a certain magnitude before electrons can be removed. However, threshold energy refers to solid metals, whereas ionization energy refers to removing an electron in the gas phase. Hope this helps!


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