a couple of questions on corona discharge tubes

1. in AC corona discharge tubes (such as in ozone generator tubes), are all the molecules positively ionized? (out of the ones that are ionised of course, i know some aren't) or some negative and some positive?

2. if nitrogen is used in such a tube, will the ions only be N2^+/-1 or will some be +/-2 etc? will any of them completely split into atomic nitrogen?

3. if nitrogen is used in such a tube, will the nitrogen ions stay in an ionised state and come out the other end still ionised or will they somehow combine (like oxygen forming ozone) or 'deionise' (for want of a better word) one another?

i think that is all.

please refer to which questions you are answering when you do so i don't get too confused.

and try not to use too much unnecessary technical talk where possible haha

thankyou kindly