Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

# Periodic Density

## by Tolle, published Feb 21, 2013

Periodic Density by Tolle Feb 21, 2013
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# Summary

My first upload! This is a 3D periodic table, with the relative height of an element representing its density. (The first of many "periodic trends" I hope to print.)

# Instructions

(You might prefer "various periodic tables" instead...it includes the density, but also other trends.)

Hey! I've just started larnin' me this stuff! The openscad file is not elegant (yet), but if you want to play with it here it is. I designed a spreadsheet to take any "periodic" data and write the source code for an openscad file that will render boxes representing the elements. The raw data is converted so that the greatest value among the elements makes a box 3 cm high. It uses to put the symbols for the elements on the boxes.

This should be great for any chemistry teacher trying to show how the elements' properties are related to their positions on the periodic table (and thus to electronic configurations.) If this upload works, I can upload ionization energy, electron affinity, effective nuclear charge -- you name it! (Please let me know if you find this useful,or can suggest modifications -- for example, for some I'll leave off the labels and make identification for those a puzzle for my students.)

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@nitewing76 I've seen most of the episodes of Breaking Bad #Heisenberg #crystal, so I KNOW a thing or two about chemistry #biology #physicstho. I have to agree with @TheFans on this one, from what I have studied pD does in fact equal nKT.

Dear Tolle, how dare you question my chemistry knowledge :(

Actually Tolle, YOU are wrong.....Density is pD=nKT, p being pressure, n being number of moles, K being 9E9, and T being time. I have a phd in organic chemistry so I would know!

This is funny, T is temperature....

YOU are wrong, I'm an undergrad so I should know! (lol) YOU are are a prideful and arrogant fool...I'm a father and military veteran of 17 years and counting, so I should know!! (LOL) Apparently I need to have the same conversation with you as I have had with my daughter...It is acceptable to be wrong, but it is NOT acceptable to assume that you are right!!! The CRC Handbook of Chemistry and Physics defines Density(p) as, "...mass per unit volume. More generally, the amount of some quantity (mass, charge, energy, etc.) divided by a length, area, or volume." The CRC Handbook also uses mass/volume in their tables while discussing the elements. This trumps your crackerjack Ph.D. Along with the CRC, the authors of Chemistry: A Molecular Approach 2ed (Tro, 2013), Chemistry 8ed & 9ed (Zumdahl, 2010 & 2012), and Engineering Mathematics 6ed (Bird, 2010) also disagree with you.

So to borrow a phrase from a wise math teacher I know..."BAM! Now go do your homework..."

Listen up @nitewing76. Who the hell do you think your are? If your were in one of my classes, I would kick you to the curb faster than you could 3D print a straight line. I, like @TheFans, have a PhD in Organic Chemistry and I KNOW that PD=nKT is valid. I have devoted years of research into the topic and all the results have been coming back positive. The science community has moved beyond the archaic "Ideal Gas Law". We have broadened our minds, wider than your girth, and have realized the true mysteries of the universe. In short, open up your eyes and shut your mouth and leave the chemistry to the big boys.

Periodic Density=(Molecular Weight)/(Atomic Radius)?

No. Density = mass/volume. It is just a "periodic" trend.

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