... becomes a plasma? I am trying to find information on the species that will be present when a gas is broken down into a plasma for different types of gas and temperatures, is there a list somewhere, please could someone give me an idea of where I should look for this information? Also am I correct in assuming that at lower temperatures there is disassociation and higher temperatures there is ionisation? And therefore there would be more radical species at lower temperatures and more chemical reactions in a reactive environment. Thanks for any help on this, the plasma physics field is huge and having trouble figuring out where I would locate this information.