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neptunium
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lol!! indeed!
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phlogiston
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A good contender for the most expensive element must be flerovium (officially still named Ununquadium, Uuq, element 114). The production of 12 atoms
of it took a year to produce at a facility that burns approximately 100 million US dollars a year.
[Edited on 29-12-2011 by phlogiston]
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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hissingnoise
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And the race is now on for measurable quantities of the expected super, super rare holyshitium!
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neptunium
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theres an old theory about a valley of stability beyond element 120 ... hollyshitium might be in that area
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Elawr
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Tellurium hexafluoride, a toxic, unstable compound which is gaseous at room temperature with density greater than 10grams/liter. I know of no other
denser vapor. You could almost float a boat in pool of this stuff!
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UnintentionalChaos
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Quote: Originally posted by Elawr  | | Tellurium hexafluoride, a toxic, unstable compound which is gaseous at room temperature with density greater than 10grams/liter. I know of no other
denser vapor. You could almost float a boat in pool of this stuff! |
WF6 has you beat.  It's just barely a gas at room temp, though.
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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GreenD
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I'm not sure which one but cryptands or clathrochelates chelate metal ions so irreversibly that they can never escape, except if you denature or
destroy the organic molecule. Hence "Crypt"-and and "Clathr-ochelates. Clath means bar or cage.
(Think EDTA but with a vengence)
[Edited on 20-1-2012 by GreenD]
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GreenD
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| Quote: Originally posted by Sedit | | Total annihilation goes against what one normally looks for in the conclusion of any conflict, we normally look for total conformity, destroying our
opposition is just a sad side effect of oppressing there will power. |
You need someone left over to buy your subsidized corn and little trinkets... Go capitalism!
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rstar
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Is there a gas so-called "Oxygen" ?
I recently heard that it acts as a good oxidant , but some say another gas (i think they called it "flauriine" or "florine" somewhat) acts much better
oxidant. 
"A tidy laboratory means a lazy chemist "
- Jöns Jacob Berzelius
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neptunium
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| Quote: Originally posted by rstar | Is there a gas so-called "Oxygen" ?
I recently heard that it acts as a good oxidant , but some say another gas (i think they called it "flauriine" or "florine" somewhat) acts much better
oxidant. |
yup been talked about at the begining already...
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AndersHoveland
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What about the most extreme aphrodesiac compound?
There is a plant grown in Southeast Asia called Tongkat ali (Eurycoma Longifolia). Researchers from the School of Pharmaceutical Sciences in
Malaysia, did tests which suggested that the root of Tongkat ali stimulates sexual arousal in rats. The Asian Congress of Sexology published a paper
in 2002 showing that consumption of the plant increased testosterone levels in humans.
http://www.sciencedirect.com/science/article/pii/S0367326X10...
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neptunium
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too bad it wont grow in my back yard..
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AndersHoveland
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don't worry, there is always ecstacy or rohypnol
Bufadienolides can be derived from toad venom, but can lead to side effects including chest pain, abdominal pain and vomiting,
disrupting the normal rhythm of the heart, and sometimes death.
Cantharidin is a powerful irritant vesicant (blister-inducing) substance obtained from blister beetles. It is claimed to have aphrodisiac properties,
as a result of its irritant effects upon the body's genitourinary tract, and can result in poisoning if ingested.
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White Yeti
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"giver of bad advice"
How fitting!
"Ja, Kalzium, das ist alles!" -Otto Loewi
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AirCowPeaCock
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| Quote: Originally posted by shivas | | Quote: Originally posted by paulr1234 | | Most potent inorganic neurotoxin (I think Botulism is actually the most potent neurotoxin but given that it is a naturally occurring protein, I'm not
sure where it should sit in a chemical taxonomy). |
Botulinum is in fact the most acutely toxic substance known. Less than a kilo is enough to kill the whole planet. |
Amazing that means 143 nano grams can kill one person!
BOLD
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Mr. Wizard
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Mono atomic Hydrogen combining to form H2. The reaction of H + H =H2 +422 kJ energy is more powerful than any other chemical reaction per unit
mass. Some work has been done studying small amounts of H monatomic gas at very low (< 1K) temperatures and using a strong magnetic field. The gas
has been used in Atomic hydrogen welding, but is generated at the tips of Tungsten electrodes in an arc, and only lasts until it strikes the cooler
surfaces of the 'work', where it combines to produce it's prodigious energy. As a comparison 2 H2(g) + O2(g) → 2 H2O(l) + 572 kJ (286 kJ/mol)
which weighs 36 grams per Mole of product, or 18 times as heavy.
http://en.wikipedia.org/wiki/Hydrogen
http://www.weldingarticle.com/atomic-hydrogen-welding/atomic...
and 'cough' ;-)
http://www.lateralscience.co.uk/AtomicH/atomicH.html
http://www.science.uva.nl/research/quant/sph.html
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AndersHoveland
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Would it theoretically be possible to stabilize large quantities of monoatomic hydrogen using a powerful superconducting magnet and very cold
temperatures?
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AirCowPeaCock
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Is that where alot of the energy released from Hydride, alkali and alkaline earth metals reacting with water come from?
[Edited on 1-24-2012 by AirCowPeaCock]
[Edited on 1-24-2012 by AirCowPeaCock]
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Mr. Wizard
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I think the energy of alkaline hydrides reacting with water is from the alkaline metal combining with oxygen provided by the water. When an alkaline
hydride reacts with water the existing bonds between the hydrogen and the metal have to be broken, and the energy of breaking the bonds in water also
have to be broken. The 'bottom line' total of energy liberated no doubt includes the formation of H2 as well as alkaline oxides, hydroxides, hydrated
hydroxides and other products far beyond my knowledge.
This 'entry' to the extreme compounds list was because of the high energy available from this simple and ubiquitous allotrope molecule. It is mostly
unrecognized by most because it is so hard to keep it in from combining we never see it. Its energy density, energy, reaction (burning?) temperature ,
and difficulty of isolation are all extreme.
[Edited on 24-1-2012 by Mr. Wizard]
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AirCowPeaCock
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It is pretty cool. I never knew that about mono-atomic hydrogen, I never really consider it much, because it hardly exists in everyday...stuff. the
closest we really get is H- and protons. But now thinking about it again, in hydride reactions, its really H- and H+ so would it have the same
energy?
BOLD
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Methyl.Magic
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The most acidic compound is neither the SbF6 nor the perfluorocarborane but Hydroheliumic acid HeH+ with a pKa of -60 !!!! But it's more a physical
compound than a chemical one ...
The MOST HEAVY is Osmium.
The MOST LIGHT is aerogel.
The MOST TOXIC is polonium or botulinium
The MOST COLD is liquid Helium
The MOST BASIC is probably t-Butylcesium if it exists.
The organotellurium have the palm of the most putrid compound. Chemistry of telluride cannot be really investigated because chemists wouldnt work with
this element anymore since they lost their wife and their friends because when some telluride compound are in the body they slowly diffuses a stroug
garlic odour out of the skin that can lasts up to one year according to some source I've forgotten...
What is the most hard, the best reducing agent, the most complexe one, the most ?
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AndersHoveland
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It may be the most "acidic" molecular species, but the positively charged ions cannot be considered a compound itself, especially in light of
the fact that it would protonate any known anion. HeH+ has never been isolated into a condensed compound.
I would have guessed cesium boride, but the compound sodium boride does not seem to exist, at least not in the proportion Na3B. This should not really
be too surprising. Potassium nitride is also extremely basic (equivalent to at least >26 pKa), but only small quantities have ever
been prepared because the compound is not very stable (nitrogen gas will not react with potassium at any temperature). Another unusual organic
compound, 1,8-bis(hexamethyltriaminophosphazenyl)naphthalene, has unusually high affinity for protons, and as such has a pK of 29.9
in acetonitrile! also see http://en.wikipedia.org/wiki/Lithium_tetramethylpiperidide
Trying to determine the "strongest" base is somewhat relative, because compounds can be "basic" in different ways. Similarly, reducing agents can also
be reducing in different ways. For example, potassium will easily reduce lithium chloride, but it is lithium that can reduce nitrogen gas, not
potassium.
[Edited on 24-1-2012 by AndersHoveland]
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AirCowPeaCock
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does Hydroheliumic acid even exist? I got no Google hits. Source?
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AirCowPeaCock
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Scratch that, I found it.
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White Yeti
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There's an "edit" button in the right hand corner of every post for the first 48 hours, you can delete your post(s) if you want.
"Ja, Kalzium, das ist alles!" -Otto Loewi
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