Sagan y la tabla periódica

Este vídeo es un fragmento del episodio 9 de COSMOS, en el que el gran Carl Saganel maestro de todos nosotros«) explica el origen de los elementos químicos, la ordenación de la Tabla Periódica y la estabilidad de los átomos.

La explicación la da desde el Laboratorio Cavendish, un lugar fascinante en la historia de la ciencia, del que hemos hablado en el programa El Nanoscopio.

[youtube]http://www.youtube.com/watch?v=71NkR1Mtolk[/youtube]

 

Nota: Este post participa en el XXVII Carnaval de Química que aloja el blog Educación Química.

Bernardo Herradón
CSIC
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290 comentarios

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  2. Closed several other tabs to focus on this one as I read, and a stop at matrixmode held my undivided attention the same way, content that earns full focus in an attention environment full of competing pulls is content doing something genuinely well and the team behind it deserves recognition for that achievement consistently.

  3. Reading this felt productive in a way most internet reading does not, and a look at dawncore continued that productive feeling, sometimes the open web feels like a waste of time but sites like this remind me why I still bother to look around rather than retreating to old reliable sources for everything I need.

  4. Bookmark added without hesitation after finishing, and a look at dataoasis confirmed I should bookmark the homepage too rather than just this page, the rare site that earns category level trust rather than just single article approval is the kind I want to rely on across many different topics over time.

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  6. Now planning to write about the topic myself eventually using this post as a reference, and a look at clementecenter would also serve in that future piece, content that becomes raw material for my own writing rather than just informing my reading is content with multiplicative value and this site is generating that multiplicative effect.

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  8. A piece that was confident enough to leave some questions open rather than forcing closure, and a look at fbgm continued that intellectual honesty, content that admits the limits of its scope is more trustworthy than content that pretends to total understanding and this site has the right calibration on certainty consistently.

  9. Worth pointing out that the writer made the topic feel more interesting than I had been expecting, and a look at myriadcloud continued that elevation effect, content that improves the apparent quality of its subject through skilled treatment is doing something real and this site has clearly developed that kind of editorial alchemy throughout.

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  12. Now recognising that this site has earned a place in the small group of resources I treat as authoritative, and a stop at onyxdash confirmed that placement, the difference between resources I trust and resources I just consume is real and this site has clearly moved into the trusted category through consistent quality over time.

  13. Most posts I read end up forgotten within a day but this one is sticking, and a look at fishingscience extended that lingering effect, content that survives the immediate moment of reading rather than evaporating is content with genuine retention quality and this site has been producing memorable pieces at a rate notable across my reading.

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  27. Really like the way the post resists reaching for cliches that would have made it feel generic, and a quick visit to focuscreatesmomentum kept that fresh feel going, original phrasing and unexpected metaphors are signs that the writer is actually thinking rather than just stitching together familiar phrases into the appearance of content.

  28. If a friend asked me where to read carefully on the topic I would send them here without hesitation, and a look at directionfeedsprogress confirmed the recommendation strength, the directness of my recommendation reflects how confident I am in the quality and this site has earned undiluted recommendations from me across multiple recent conversations actually.

  29. Ended up here on a wandering afternoon and was glad I stayed for the read, and a stop at dylanbeltran extended the wandering into a proper exploration of the site, the kind of place that rewards aimless clicking with something genuinely interesting rather than the shallow content that mostly populates the modern open web.

  30. Appreciated the way each section connected smoothly to the next without abrupt jumps, and a stop at directionenergizesprogress kept that flow going nicely, transitions are something most blog writers ignore but the difference is huge for the reader who is trying to follow a sustained line of thought today across many different topics.

  31. Now sitting back and recognising that this was a small but real win in my reading day, and a stop at clarityactivatesgrowth extended that quiet win, the cumulative effect of small reading wins versus the cumulative effect of small reading losses is real over time and this site is contributing to the wins side of that ledger.

  32. The whole experience of reading this was pleasant from start to finish, no pop ups and no annoying interruptions, and a look at progressmoveswithclarity continued that clean experience, technical choices about page design matter for the reader and this site clearly cares about the small details that add up to comfort across multiple visits.

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  34. Generally I bookmark sparingly to avoid building up a bookmark graveyard but this one earned a permanent slot, and a stop at directiondrivesmotion extended that permanence designation, the few sites I keep permanent bookmarks for are sites I expect to use repeatedly and this one has clearly cleared that expectation bar today.

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  39. Worth pointing out that the writer made the topic feel more interesting than I had been expecting, and a look at growthunfoldsforward continued that elevation effect, content that improves the apparent quality of its subject through skilled treatment is doing something real and this site has clearly developed that kind of editorial alchemy throughout.

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  45. Reading this fit naturally into my afternoon walk because I was reading on my phone, and a stop at focusguidesgrowth continued well in that walking format, content that survives mobile reading without becoming awkward is content with format flexibility and this site has clearly thought about how it reads across different devices today.

  46. Decided not to comment because the post said what needed saying, and a stop at blog33become continued that complete feel, content that does not invite obvious additions or corrections from readers is content that has been carefully considered and this site appears to consistently produce pieces that satisfy rather than provoke unnecessary follow ups.

  47. Reading this in the morning set a good tone for the day, and a quick visit to webtitan kept that good tone going, content can do that sometimes when it hits the right notes and finding sites that consistently strike that tone is something I have learned to recognise and reward with regular visits.

  48. Thank you for the genuine effort here, it shows in every paragraph and not just the headline, and after my visit to ideascreatepathways I was sure this site cares about getting things right rather than chasing clicks, which is the main reason I will come back later this week to read more.

  49. A quiet kind of confidence runs through the writing, and a look at clarityguidesdirection carried that same understated assurance, confidence without bragging is the most attractive register for online writing and the writers here have clearly developed it through practice rather than affecting it through stylistic tricks that would feel hollow eventually.

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