Here's a fun question, prompted by this blog posting:
How many of the chemical elements have you worked with in your research and teaching, either in elemental form or in a chemical compound?
I did a quick count and IF I can trust my memory (which is a big if), then I have worked with about 50 of the elements. I am weak on the 2nd and 3rd row transition metals and the heavier main groups, not to mention the actinides and trans-actinides. But, I have worked with tellurium (molten elemental tellurium as a solvent!), scandium, and some of the lanthanides, unlike the blog author. I guess that is the advantage of being a solid state chemist rather than an organometallic chemist.
We are experimenting with the ability to attach files to a forum post, so I have attached my periodic table with the elements I have worked with shaded in blue. At the moment, it only appears that one can attach files to an original forum post and not to replies. Would you like to see that ability extended to forum replies as well?