Are there any cases where the atoms do the moving in gas to conduct electricity?

  • 10 Replies
  • 3826 Views

0 Members and 1 Guest are viewing this topic.

*

Paul Anderson

  • Guest
Paul Anderson  asked the Naked Scientists:
   
Electrons go down a wire. Electrons pass through old radio valves. Are there any cases where the atoms do the moving in gas?
What do you think?

*

Offline Vern

  • Neilep Level Member
  • ******
  • 2072
    • View Profile
    • Photonics
Ions which are atoms with missing electrons move in a liquid as in when plating metals and this conducts electricity. Same thing in the liquid of the lead acid battery in your car.

*

lyner

  • Guest
With an anode of mercury, mercury ions could well migrate to the cathode in an evacuated tube. Vaporising a pool of mercury with a positive potential (an anode) and striking an arc would cause electrons to move one way (much faster)- to the anode and mercury ions to move the other way (much slower) - to the cathode.






*

Offline RD

  • Neilep Level Member
  • ******
  • 8185
    • View Profile

*

Offline Bored chemist

  • Neilep Level Member
  • ******
  • 8841
    • View Profile
A fluorescent lamp conducts electricity while it's running. Some of that current is caried by electrons but a some is carried by argon ions and mercury ions.
In the inside of a mass spectrometer the current is carried by ions (generally positive) and it's by measuring this current that you can find out how much of a chemical is present in a sample.
Please disregard all previous signatures.

*

lyner

  • Guest
With an anode of mercury, mercury ions could well migrate to the cathode in an evacuated tube. Vaporising a pool of mercury with a positive potential (an anode) and striking an arc would cause electrons to move one way (much faster)- to the anode and mercury ions to move the other way (much slower) - to the cathode.


Durr! I was just describing a mass spec (minus the magnet) without realising it!! I didn't see the wood for the trees.

*

Offline lightarrow

  • Neilep Level Member
  • ******
  • 4586
    • View Profile
I didn't see the wood for the trees.
It's a locution? What does it mean?

*

Offline Bored chemist

  • Neilep Level Member
  • ******
  • 8841
    • View Profile
Also written as Can't see the forrest for the trees.
Unable to see something obvious.
http://www.phrases.org.uk/bulletin_board/5/messages/1529.html
Please disregard all previous signatures.

*

Offline Farrah Day

  • Jr. Member
  • **
  • 45
    • View Profile
If you are talking about atoms as an electric current, the answer to the original question has to be no. Atoms are neutral.  A current carrier needs to be a charged species such as an electron or an ion (+ve or -ve, elemental or molecular).
« Last Edit: 25/01/2009 14:58:50 by Farrah Day »

*

Offline lightarrow

  • Neilep Level Member
  • ******
  • 4586
    • View Profile
Also written as Can't see the forrest for the trees.
Unable to see something obvious.
http://www.phrases.org.uk/bulletin_board/5/messages/1529.html
Thank you very much, Bored Chemist!

*

Offline Vern

  • Neilep Level Member
  • ******
  • 2072
    • View Profile
    • Photonics
If you are talking about atoms as an electric current, the answer to the original question has to be no. Atoms are neutral.  A current carrier needs to be a charged species such as an electron or an ion (+ve or -ve, elemental or molecular).
Yes; I should have prefaced my answer with: No but;