Ytterbium has the “most complete” name of the four elements named after Ytterby (in the sense of it using the entire toponym) but it wasn’t discovered first - that would be terbium. Strangely enough, some atomic clocks at NIST use it, the irregularities imposed by quantum mechanics evened out by averaging many atoms.

@Changeling#209458
 
All elements are natural, but there are an infinite number of transuranic elements, simply defined by atomic numbers 93 through infinity, with some as yet undiscovered and likely with half-lives on the order of nanoseconds. After Plutonium, applications become highly specialized and mostly of interest to scientific research. Californium might be a decent place to stop, but I was wondering what criterion joycall was going to use.

AJ is like “See what I did there?”.
 
@Changeling#209458  
+1

@mathprofbrony  
He could do changelings for all the ‘unnatural’ elements.

This was a triumph.
 
I’m making a note here. Huge success c:

@joycall6
 
I’m curious, how far do you intend to go? Uranium, the last “natural” element?

@joycall6  
Laser is acceptable.
 
Ytterbium is also used in the doping of optical media in solid-state lasers. Though my admittedly crappy google research suggests that ytterbium lasers tend to radiate in the 1000-1200nm range, in the near infrared range of the spectrum. So….red would have been a better choice.
 
Fun pointless trivia! I remember Ytterbium from the amazingly goofy-but-actually-pretty-good Tachyon: The Fringe, a spaceflight shooter sim with Bruce goddamn Campbell voice acting the protagonist and branching story paths.
 
srsly go play that game is gud

@joycall6  
That’s OK, this is more than fine. Keep doing what you do, these are awesome and cute.

ok srsly  
does this even count

@Background Pony #4F3D  
So, I tried to draw ytterbium atomic clock, but I was complicated

Apparently, Ytterbium has produced the most stable atomic clocks.
 
http://www.nist.gov/pml/div688/clock-082213.cfm