Ionization Energy vs. Threshold energy

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Ann Pham
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Ionization Energy vs. Threshold energy

Postby Ann Pham » Fri Oct 09, 2015 11:56 pm

Are there any differences between the ionization energy and the threshold energy?

Alex Nguyen 3I
Posts: 100
Joined: Fri Sep 25, 2015 3:00 am

Re: Ionization Energy vs. Threshold energy

Postby Alex Nguyen 3I » Sat Oct 10, 2015 11:42 am

I think both are the same (i.e. an electron is removed from the atom). I know ionization energy is with regards to gases, and threshold energy was associated with the photoelectric effect on a solid metal. Concepts seems pretty similar to me though.

Cynthia De Luna 4I
Posts: 5
Joined: Fri Sep 25, 2015 3:00 am

Re: Ionization Energy vs. Threshold energy

Postby Cynthia De Luna 4I » Sun Oct 11, 2015 11:57 pm

threshold energy the mimum kinetic energy needed to turn kinetic energy into activation energy while the ionization energy is the energy needed to remove an electron

Ulysis Baal 4J
Posts: 19
Joined: Fri Sep 25, 2015 3:00 am

Re: Ionization Energy vs. Threshold energy

Postby Ulysis Baal 4J » Mon Oct 12, 2015 1:33 am

Like Alex said, the threshold energy is associated with the amount of energy required to remove an electron from a solid (via the photoelectric effect). As specified in the course reader, ionization energy refers to the amount of energy needed to remove an electron from an atom in its gaseous phase. I believe it is the phases that distinguishes the terminology, because additional energies get involved in removing an electron from a liquid/solid phase element compared to an element in the gaseous phase.


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