Periodic Table Of States | Hacker News Reader

Periodic Table Of States

table.minutephysics.com

35 pointstebeka13 comments

It took me a minute but I figured out the YouTube video is part of it, if you click on an element, you get a YouTube video of people showing the element in glass tubes and such. Awesome idea, absolutely horrid execution. On the left, between the top bar, the state of matter key, and the YouTube video, there is hardly any room to see the periodic table.

Is it just me or is everyone experiencing that the YouTube video is totally in the way of allowing one to look at this site? I can't even close the video window ("how to destroy a magnet") to actually learn what this post is all about.

The scientist who put this together probably only tested it on large monitors. I had the same experience on my laptop's main display but on my (larger) external monitor the video floats below the table. Setting the browser zoom level to something like 75% manually also fixes the problem.

Cool site though, I wouldn't have guessed that there were any elements that remain solids at 6000K, or that helium remains a liquid even at absolute 0.

Hitting the thing that looks like a play button actually toggles the video visibility.

Very cool... but where is pressure? I don't see even a mention of what pressure is being used.

Based on the state transition temperature of Al, the table displays data at 1 atm.

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What I don't get is how Carbon has a liquid state in that table. At 1 atm, solid carbon (not CO2) sublimates into its gaseous phase just below 4 kK.

It also looks to me, as if At, Bk, Cf, Es, Fm, Md, No and Lr are display buggy at high temperatures. The low right window shows them right as going from solid to gas without a liquid state, but the big period table shows them liquid at 6000K.

.... i absolutely read this as "US states" .... now i feel really dumb

Wow, didn't know magnetism also varies with temperature. Any simple explanation why?

From what I remember of my rusty high school chemistry magnetism requires a certain relatively stable configuration of the valence electrons. I'm guessing that as temperature increases it's impossible for the atoms (or even just the electrons) to maintain that configuration because of the increased energy. The electrons might even get excited enough to jump to entirely different orbitals, but I'm not sure if it works that way.

In general, magnetism requires the material to be ordered, and heating an object up involves adding lots of random motion to the system.

> The electrons might even get excited enough to jump to entirely different orbitals

That's what causes hot objects to glow, basically -- the electrons get pushed to higher orbitals, and then fall back down again, emitting light.

This explains it: https://en.wikipedia.org/wiki/Curie_temperature

In the ferromagnetic phase, the atoms are magnetically aligned and their magnetic fields adds up. If you increase the temperature past a certain point though, the atoms are jiggled enough that they can no longer stay aligned and they 'point' in random directions, and their magnetic fields cancel out.

This is a big problem in hard drives: If you increase the temerature of a hard drive the magnetic regions no longer maintain their magnetization and your data gets erased. A lot of hard drive technology (eg 'perpedicular recording') has been developed to solve this problem.

Good luck using this on a smartphone.

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