# Restoring the periodic table

I came across this video on the interweb; it’s an interesting overview of paper-restoration process applied to an historical periodic table from Germany. There is at least one error in the dialog; perhaps you can spot it?

There are some neat lesson-plan hooks in this video, if that’s your thing. What chemical property is the conservationist trying to adjust? What chemical(s) are used to do this? What two elements play an important role in paper restoration? Additionally, where do these elements appear on the (current) periodic table? Does that surprise you? Can you propose a chemical reaction that is happening during the restoration process?

The New Year is upon us, and it’s a year that I’ve been waiting for, since it is the 150th anniversary of Mendeleev’s discovery of the periodic properties of the elements. Discovery is probably not the right word here, since other scientists had not only organized the elements in tables but also recognized their periodic properties. That said, Mendeleev is typically credited with the discovery because of what he did with the table of elements: he predicted the properties of undiscovered elements.

# My first paper on 3D printing is published

Before leaving Chicago State University in 2017, I took a sabbatical to explore a very different avenue of research from which I was originally trained.  I became interested in learning how digital fabrication tools, such as 3D printing, can be used to create inexpensive or customized scientific instrumentation that could be used for education or specialized research applications.  Now at The College at Brockport, I’ve finally put together my first 3D printed scientific instrument, which was recently published in the journal HardwareX.  The article, OMIS: The Open Millifluidic Inquiry System for small scale chemical synthesis and analysis, is open access, which means that anyone can read and download the article by heading here.

I’d like to think that when people do something important (like publish an article) they get interviewed.  Unfortunately, it’s that time of the semester where students are so stressed out, the last thing they want to do is talk to professors about anything other than “what’s on the test.”  So, if I were to give an interview, here’s the questions I’d answer (and ask) about the paper.

# Show your spirit – periodically

It’s Homecoming weekend at Brockport and Mandy, the voice-activated periodic table is showing off her school pride with green and gold periodic trends!

The four blocks of the periodic table.

OK, perhaps her colors are a little bit off, but give her a break; she’s a periodic table for crying out loud.  Does your periodic table have this much school pride?

Atomic weight – green is light and gold is heavy.

# Periodic Tables at BCCE 2018

I’ve just gotten back from another wonderful BCCE conference (that’s Biennial Conference on Chemical Education) which was held at Notre Dame.  It was a great opportunity to catch up with some friends and colleagues that I’ve missed since leaving CSU last year to join the College at Brockport.

I presented some of the work I’ve been doing on 3D printed periodic tables and will blog about their construction and use in the near future.  There were some folks in the audience who wanted to get started right away with the objects, so I’ve posted them here on my website.  You can download a zip file that contains 19 tables (about 3 MB).

The zip file contains the following periodic trends:

• ionization energies
• electron affinities
• electronegativities
• human abundance
• exceptions to the aufbau principle
• absolute (Pearson) hardness

For the first four, there are four different sizes

• 132×76 $mm^2$ table with title, f-block elements and symbols on each of the blocks.  These objects take about 3 hours to print.
• 150×21 $mm^2$ table with no title, no f-block elements and symbols on each of the blocks.  These objects take about 2.5 hours to print.
• 108×36 $mm^2$ table with no title, no f-block elements and symbols on each of the blocks.  These objects take about 2 hours to print.
• 60×24 $mm^2$ table with no title, no f-block elements and no symbols on the blocks.  These objects take about 45 minutes to print.

As I build a collection of posts and materials for 3D-printed periodic tables, I will collect them here, so if you have interest in this project, bookmark that page.