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Bhodi posted:There was one of those flash crazes a few weeks ago on reddit where everyone dogpiled in to show off their uranium glass collections.
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Feb 2, 2015 05:50
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My dad has an old military radio transmitter, with radium paint on the dials. That stuff glows in the dark nicely. Back when they used that stuff, factory workers were told to lick the paintbrushes to get a smoother result. But not in their mouth.
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Feb 2, 2015 09:40
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Carbon dioxide posted:My dad has an old military radio transmitter, with radium paint on the dials. That stuff glows in the dark nicely. Radium girls were mainly known for watches, and I never knew that they also did radio dials up to the 1960's. Thanks
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Feb 2, 2015 10:27
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Already posted waayyy back in this thread, but radium water used to be a popular 'health tonic'. Genesplicer has one of these jars and has posted pictures before.
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Feb 2, 2015 10:45
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I love everyday radioactivity, so I have one of these tritium marker lights on my keychain: It'll glow for ~10 years, not bright enough to see with the lights on, but very striking in the dark. And it's got that fluorescent "nuclear" glow that we all love from movies and cartoons etc.
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Feb 2, 2015 11:09
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KozmoNaut posted:I love everyday radioactivity, so I have one of these tritium marker lights on my keychain: I have one too. This picture makes it look a hundred times as bright as it really is.
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Feb 2, 2015 15:57
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I've got one as a pendant hanging around my neck. It's not very bright at all, you can only tell it's glowing if the room you're in is pitch black. I can barely even see it through my shirt at night.
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Feb 2, 2015 17:49
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Feb 2, 2015 18:42
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Feb 2, 2015 19:44
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Carbon dioxide posted:I have one too. This picture makes it look a hundred times as bright as it really is. Yeah, it's a little misleading. But it's bright enough at night to be interesting. 
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Feb 2, 2015 21:40
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My coffee scoop is made of uranium glass. I like my coffee hot.
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Feb 2, 2015 22:20
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Platystemon posted:The correct PPE for hydrofluoric acid is grad students. Bingo. I was that PPE. No, nothing smart was being done with HF or aqua reggia.
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Feb 3, 2015 01:06
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Feb 3, 2015 01:08
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KozmoNaut posted:I love everyday radioactivity, so I have one of these tritium marker lights on my keychain: ~suffused with an incandescent glow~ For some reason I always like to read this thread with Tom Lehrer playing.
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Feb 5, 2015 15:00
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I wish I could remember what the exact compound was- This kind of viscous yellow sludge that was a compound of lead and some other thing. We were working with it in Honors Chemistry in high school, and our teacher put the fear of God into us by telling us that if it touched our skin we would get cancer. In retrospect, given the setting, I think he was exaggerating.
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Feb 5, 2015 22:00
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deadly_pudding posted:I wish I could remember what the exact compound was- Probably lead tetrachloride. You would have trouble ingesting enough to give you cancer.
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Feb 5, 2015 22:16
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deadly_pudding posted:I wish I could remember what the exact compound was- On the other hand, I went on a date the other day with someone who works with hydrofluoric acid every day. She gave me a very thorough description of exactly what would happen if you were to spill it on your bare skin. She also said that the first year or so, she would get this weird feeling afterwards, just knowing what she had worked with. "But after a while, it just becomes routine". That was a weirdly cool date, let me tell you. I'm hoping for a second date, providing she hasn't killed herself yet.
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Feb 5, 2015 22:19
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Deteriorata posted:Probably lead tetrachloride. You would have trouble ingesting enough to give you cancer. Of course when it reacts with water to make Hydrochloric Acid and Lead Oxide you won't be having much fun. Not enough to have insta-cancer, but enough to make you mad at yourself that you did that.
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Feb 5, 2015 23:47
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deadly_pudding posted:I wish I could remember what the exact compound was- Could have been lead iodide as well. Which is one of my favorite basic chemistry magic tricks, pour a clear liquid (potassium iodide, aqueous) into a clear liquid (lead nitrate, aqueous) and a giant cloud of bright yellow insoluble lead iodide forms and sinks to the bottom. Or any number of other lead salts and many cadmium salts as well, IIRC.
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Feb 6, 2015 01:27
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kastein posted:Could have been lead iodide as well. Which is one of my favorite basic chemistry magic tricks, pour a clear liquid (potassium iodide, aqueous) into a clear liquid (lead nitrate, aqueous) and a giant cloud of bright yellow insoluble lead iodide forms and sinks to the bottom. Yeah, it sucks that lead is so toxic because it's great for so many things otherwise. It makes lots of cool compounds of multiple colors and crystal shapes, and they're so heavy that you can do good gravimetric analysis on a cheap mechanical balance. Same goes for mercury, actually. Safe elements are boring or expensive. 
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Feb 6, 2015 01:50
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Posted by a friend on facebook:
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Feb 6, 2015 03:38
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TerminalSaint posted:Posted by a friend on facebook: "But it said 'BEER'! "
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Feb 6, 2015 08:46
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kastein posted:Could have been lead iodide as well. Which is one of my favorite basic chemistry magic tricks, pour a clear liquid (potassium iodide, aqueous) into a clear liquid (lead nitrate, aqueous) and a giant cloud of bright yellow insoluble lead iodide forms and sinks to the bottom. Yeah, lead iodide is the more likely of those two. I recall doing that general experiment. That class was like 50% magic tricks and 50% "For god's sake don't touch the crucible while it's glowing."
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Feb 6, 2015 13:38
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Kids, if your job involves handling boiling aqua regia, don't use latex gloves as "sufficient" protection.  Had to explain this to a coworker today. We agreed to order some actual gloves. Default Settings has a new favorite as of 14:25 on Feb 6, 2015 |
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Feb 6, 2015 14:21
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That lead salt trick is a classic experiment in stoichiometry, too, since it's lead(II) and an alkali.
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Feb 6, 2015 16:57
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TerminalSaint posted:Posted by a friend on facebook: PerrineClostermann posted:"But it said 'BEER'! " It's missing some punctuation. It actually reads 15 CHEM? NO, BEER IN HERE!
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Feb 7, 2015 02:57
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Say Nothing posted:It's missing some punctuation. It actually reads Whoops, and this IUPAC logo isn't supposed to be here either.
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Feb 7, 2015 06:31
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Our Grandparents had such fun toys.
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Feb 9, 2015 01:50
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Say Nothing posted:Our Grandparents had such fun toys. Still pretty tame. Everything in the kit is still readily available, and in no way dangerous.
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Feb 9, 2015 01:57
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7thBatallion posted:Still pretty tame. Everything in the kit is still readily available, and in no way dangerous. I bet it would hurt if I smashed it over your head 
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Feb 9, 2015 07:35
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Cross post from space flight thread: OMFG PTSD LOL PBUH posted:I was trying to think of exotic oxidizers to increase chemical rocket ISP
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Feb 10, 2015 06:32
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I wouldn't be surprised if that stuff just explodes on itself, forming FOOF and chlorine for one nanosecond before it explosively decomposes further into F2, O2, and Cl2.
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Feb 10, 2015 14:30
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Even if that molecule has been figured out it's likely it's not economically feasible as compared to the other listed oxidizers he suggested. Id imagine the biggest problem with the molecule he described is the storage conditions.
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Feb 10, 2015 14:44
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Combustion engineering is the study of writing down all possible combinations of elements present in the reactants and pretending to have discovered 80 intermediate reactions between C + O2 --> CO2.
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Feb 10, 2015 14:53
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Wait, so F3-O-Cl-O-F3, or all the Fs and Os bonded directly to the Cl? Betting the latter isn't possible due to bond stress, and the former doesn't make sense due to bond count, you can't put 3 fluorines on an oxygen.
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Feb 10, 2015 16:39
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kastein posted:Wait, so F3-O-Cl-O-F3, or all the Fs and Os bonded directly to the Cl? Normally you can only do 1 bond to Cl, but that didn't stop anyone from making ClF3  I wonder if you could do some shenanigans with O3 to make it amenable to accepting a ClF3 molecule?
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Feb 10, 2015 16:47
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kastein posted:Wait, so F3-O-Cl-O-F3, or all the Fs and Os bonded directly to the Cl? F3ClO2. The fluorines in equatorial sites, oxygens in axial sites for overal trigonal bipyramidal geometry. It's a known compound, but not very stable and primarily useful as an exercise in drawing Lewis structures. It doesn't seem to occur to some people that there may be practical reasons for not storing thousands of gallons of highly toxic ferocious oxidizers in one place. It's not really worth the slight increase in Isp if a tiny leak makes your entire launch facility go up in flames, along with all the people in it.
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Feb 10, 2015 16:51
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And this is where it becomes obvious that I dabble in chemistry and Deteriorata does not It's been way too long since I looked at structures and I forgot chlorine could do that. Thanks. (good to know it's about as stable as I would expect, though)
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Feb 10, 2015 17:13
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Deteriorata posted:F3ClO2. The fluorines in equatorial sites, oxygens in axial sites for overal trigonal bipyramidal geometry. Would Fl3ClO2 burn a substance such as C4N2 hotter than pure O2? Because right know we can burn Carbon Subnitride in pure O2 at around ~5000 C... I wonder if CTF or FOOF or Fl3ClO2 burn Carbon Subnitride even hotter than that? Also that seems like it'd be the most horrific green house gas "event" in mankinds history if you fired a rocket engine in atmosphere that burned Fl3ClO2 with C4N2. A flame so hot it melts tungsten, and smoke that's the most potent greenhouse gasses in existence and toxic and carcinogenic as all gently caress. That'd be some crazy poo poo.
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Feb 10, 2015 17:23
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kastein posted:And this is where it becomes obvious that I dabble in chemistry and Deteriorata does not Chemistry is really very simple. It works like this: 1) Tell chemists they can't possibly synthesize some structure. 2) A chemist will find a way to make it. The crazier the compound sounds, the harder they will try.
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Feb 10, 2015 17:38
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