"He dumped a Noble Gas because it wasn't reactive enough." Hilarious.
"Oh sorry, maybe you had actually intended to search this article and are reading this therefore wasting your precious time." - Nice parody on Wikipedia's often ridiculous attempts to get you to an obscure article you probably weren't looking for.
"He was caught in the lab the day after singing I don't love you like I did yesterday to the silver nitrate, completely ignoring of the dumbfounded science teachers crowded around him." - beautiful image, there.
The concept that MCR's songs are all educational. I literally LOL'ed at the concept that "I'm not okay/ I'm not okay/ I'm not okay/ You wear me out" was about isotope decay. Awesome.
The paternity test of Hydrofluorard. Nice.
The "facial expressions" section. So, so pointless. So, so funny.
"born exposed to dangerous amounts of Agent Orange resulting in a birth defect making him sexually attracted to chemicals." - this just isn't how I'd want to set up his "Chemical Romance." I mean, it's romance. Let's at least start there before moving on to sex.
The necrophiliac inmates assault a pedophile bit - what?? You're just way off topic, and it sound pretty puerile.
This article references kitten huffing. Kill that shit with fire. I don't know who thinks that's funny anymore.
The whole "Assault by Crazed Fan" section. It reads almost like a homophobic screed and contains very few actual jokes. The bit about a "razor" being found on him, and that being a damning piece of evidence, was funny, though. Actually, it might be funny if the entire section was about police who reach far too aggressive conclusions based on slim-to-no evidence. For example, instead of "The Advocate" proving that he was gay, you might try "People" or "Entertainment Weekly." Just a thought.
You spend a lot of time talking about elements instead of chemicals. Instead of dumping Neon for Aluminum, why isn't he dumping, say, naphthalene for carbon tetrochloride? (But keep that noble gas/ reactive pun in there, that's gold).
The whole idea that "My Chemical Romance" is not about drug use but about an actual romantic inclination toward chemicals in general - any chemicals - is a great concept, and you come pretty close to pulling it off.
Prose and formatting:
This article desperately needs copyediting. Case in point: your lede is one sentence. Now, class, can you tell me what's wrong with this sentence?
"Gerard Way (pronounced: Gee-rard-Waaaaaaaaaaaaaaaaaaaay) is the lead singer of the hard rock/ pop/punk/emo/hardcore/country/classical/jazz/alternative rock/hard-to-classify-the-genre-of band My Chemical Romance as well as a famous suitor of chemicals (like the ones on the Periodic Table), apparently he dumped a Noble Gas because it wasn't reactive enough during the course of their intimate relationship."
Pretty good. Basically, just adequate, except the aforementioned "Facial Expressions," which were really pretty hilarious. I love the caption on the first picture. Drawback: "The Cock Up My Ass Was This Big" picture was kind of juvenile. The idea could work, but with a subtler caption ("cock up my ass" is not the height of subtlety.)
This is like 90% of the way there. It's pretty consistent, it's pretty funny, it's pretty damn good.