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Video on five most dangerous chemicals.
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if you like that article you'll love this video "5 of Worlds most dangerous Chemicals" this video

11.9M views · Dec 13, 2014 · 10:45 · 3 HN recommenders · 3 mentions · discussed 2015–2020
A SciShow episode in which Hank Green introduces five of the most dangerous chemicals, from lethal toxins to substances that explode on contact. It is an entertaining overview of extreme chemical hazards.
Why Hacker News points people here: Recommended as a fun companion to threads about hazardous chemistry, such as hydrofluoric acid and reactive substances.
“This is a fun video to watch”HN comment, 2020
“if you like that article you'll love this video”
Video on five most dangerous chemicals.
if you like that article you'll love this video "5 of Worlds most dangerous Chemicals" this video
“One of the substances featured on the excellent”
SciShow episode featuring dangerous substances.
One of the substances featured on the excellent "5 Most Dangerous Chemicals" episode of Sci-Show: this video
“This is a fun video to watch”
Fun overview of extremely dangerous, reactive chemicals
Yes concrete is "flammable" in the context of fluorine (most things are though). Chlorine trifuoride is extremely notorious for that. Silicon dioxide can be oxidized by fluorine (which is a stronger oxidizing agent than oxygen, so...) P.S. This is a fun video to watch this video for "exciting" chemicals.