# 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.

# What’s growing

Now that my students are wrapping up their summer research activities, it’s time to share some of my new designs.  This one is inspired by my students – they wanted to design and 3D print keychains – and Rozenn’s request to have name tags for our plants.

Rosemary, thyme and sage, with a bit of patriotism to boot.

Read on to see how I designed these, which involved a little bit of magic for the swash ornament.

# Ants Be Gone!

Our hummingbird feeder was inundated with ants. While there are plenty of commercial options available for solving this problem, I wanted to try my hand at designing my own solution. In thinking about how a water trap should be designed, I came up with the following critical elements.

1. A leak-free cup for the water (duh)
2. An upper attachment point that prevents tipping of the cup
3. A lower attachment point that is integrated into the monolithic design.

Here’s the result.

I’m not fast enough with the camera to take a picture of a hummingbird.

# Prusa MK2S finally finished

I’ve had my MK2S printer sitting in a box for quite some time (I did have an X-carve to put together and a few assignments to grade – oh and I published a paper, but more on that later).  This is my second 3D printer, the first being a Makerfarm i3v.  I love my first printer, and it taught me a lot about the design and maintenance of these machines.  That said, I’ve always had a hard time with calibration and getting the prints just right.  My first successful 3D print with the i3v was a cube in ABS, and I was so proud.  Here’s my first successful print with the MK2S (brought to you from one of my students, Anusha Ventress, who is moonlighting as a videographer while she works in my lab):

OK, technically, this was the 3rd successful print on my MK2S, but all I can say is: wow.