Praseodymium - Tales from the Periodic Table
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- เผยแพร่เมื่อ 6 ก.พ. 2025
- Slowing light down to only a few hundred meters per second? Reaching 1/1000 degree above absolute zero? Keeping glassblowers from being blinded while they work? These are only a few things made possible by Praseodymium. Lots more in the video about this "rare earth" metal that's not-so-rare!
Wonderful presentation of the praseodymium applications! The final haiku is most excellent.
You can thank Mary Soon Lee for those fine haiku's. I cannot take credit for them. Find the complete set here:
vis.sciencemag.org/chemhaiku/
Ron
Woow this video was such a journey I came because I saw the picture of the atoms and got curious overall, but oh boy I was not ready for how high the production content on the video was gonna be.
I'm glad you enjoyed the journey!
Ron
By the way, Mosander was the father of two sets of twins, at least one pair being born before he discovered didymium, so he probably had twins on the brain. One of his daughters, Hulda Elizabeth was also a chemist. I have no information about the other three.
Syd,
I tried looking up Mosander in this huge multi-volume science biography encyclopedia I inherited from the Exploratorium, but it had relatively nothing to say about Mosander's private life. Looks like I'll have to look further into your interesting side-facts. Fascinating!
Ron
Which are the common similar properties of lanthanides and actanides in group 3?
Really cool element! Even cooler than Boron imo!
A rare kudo for Praseodymium! I'm sure it's pleased to know it has a fan!
Ron
I wonder how you feel about being stuck on the lanthanides for over a year thus also having to talk about nothing *BUT* the lanthanides for over a year 😂😂
I am looking forward to seeing a video on my favorite lanthanide lutetium sometime in 2023 being slightly radioactive and not as prone to oxidation as many of the other lanthanides!
Brandon,
On the negative side, it gets a bit repetitive, but on the positive side, it's repetitive and I get to reuse slides from previous presentations! What's always amazing is that I keep finding out interesting facts that I never suspected were there, especially in the applications. So, it's never boring for me. I usually work ahead about 4 elements at a time. I just did the bulk of the presentation on Europium, so that's about half way through the Lanthanides. So... I don't feel "stuck" at all and I'm almost to the downhill side of the Lanthanides. Hope YOU don't feel "stuck"!
Ron
Brandon,
I missed part of your comment. Natural Lutetium is 97.41% stable Lu175 and only 2.59% mildly radioactive Lu176 (half life=38 billion years≈2.75x age of the universe). So there IS a completely stable isotope. Rejoice! You can have a lump of Lutetium that you can carry around in your pocket safely!
Ron
@@ronhipschman Thankfully, I'm not afraid of its radioactivity because as you mentioned: lutetium (which I have a 10-gram sample of) like the essential element potassium is considered safe despite containing a naturally occurring radioisotope, I just find that fact pretty cool! :)
I also have a much more radioactive 1-gram sample of depleted uranium metal which unlike lutetium I do have to be a bit more cautious with.
Please do Nitrogen next
Yuki, I won't be returning to the bottom end of the table for a while as I continue up at the top end, but if I find myself with some liquid Nitrogen I may return to element 7.
Ron
@@ronhipschman Thanks! But will you cover the other elements?
Yuki, maybe a bit of history will help. I started off doing these as live presentations at the Exploratorium a long time ago. Some were recorded (as live presentations) and can be found on the Exploratorium website. That was in the "before-times". I continued them as recordings during the pandemic and that's what you are finding on TH-cam. I was invited to do the first three elements (H, He, Li) as live talks at Chabot Space and Science Center in Oakland and I decided to extended the recorded series through Carbon, but ended it there because doing 2 elements every month was too much, so I'm back at the upper end of the table continuing the series.
Ron
Clap! Clap! Clap!
Was that a "slow" clap?
@@ronhipschman No sir. That was enthusiastic applause.
Life did not evolve: life was created and sustained by God. Life is much to complex to have arisen by chance. Read the Bible to find out about creation and the fall.
Douglas,
Thank you for your comment. We're going to have to agree to disagree on this point. We've actually OBSERVED evolution to take place. We're FORCING evolution to take place as we rapidly change the world. That's an observed fact. The stories and myths in the bible cannot substitute for the overwhelming EVIDENCE of natural selection and evolution as observed by thousands and thousands of scientists and others. You may choose to ignore evidence and facts and you are certainly free to do so. I cannot. Even the Vatican recognizes the amazing and wondrous forces of nature allowing life to adapt through evolution. Even that Vatican, runs a marvelous observatory and acknowledges modern astronomical discoveries (the Big Bang and all that evolved from that event 13.8 billion years ago). I understand that you are talking FAITH, and I'm talking about INQUIRY and EVIDENCE. Maybe the two cannot be reconciled, but I hope that's not the case. Be well.
Ron
A lot can happen in 14 billion years.
How do you watch something like this and come up with that conclusion
Well if a God used and created physics, big bang and used Darwin evolution theory in practice to make this happen... and 7 days creation is more metaphorical than literall, then why not? :-D We can't really tell.
@@JBereza Most Creationists I have read comments from push their lie
as a pretext to winning the argument for their form of moral authoritarianism by force. They don't care about scientific arguments, the age of the earth etc. unless it can be used to support their religion. It is a total waste of time to argue with them. Keep them occupied by arguing how they are Trump shit and farts out their asses like rabid MAGA Republicans.