Here is the Element Quiz Question:
The Question:
The credit for originally discovering this element was a huge controversy -
eventually the discovery credit was given by the International Commission
on Atomic Weights to three different individuals who all independently
"discovered" the element, including an American chemist. The discovery
credit was so controversial that this element was referred to by a
different name by German chemists up to 1949. This element has few
commercial applications primarily due to the difficulty and cost of
producing the pure element. Some of this element's isotopes have been used
to date meteorites. A compound of this element has been utilized for
detectors in positron emission tomography (PET). Which element is being
described?
The Answer:
The element is Lutetium (Lu)! Lutetium was independently discovered in 1907
by French scientist Georges Urbain, Austrian mineralogist Baron Carl Auer
von Welsbach, and American chemist Charles James. They found it as an
impurity in ytterbia. The scientists proposed different names for the
elements: Urbain chose neoytterbium and lutecium, whereas Welsbach chose
aldebaranium and cassiopeium. Both men accused each other of publishing
results based the other man's research. Charles James, who stayed out of
the priority argument, worked on a much larger scale and possessed the
largest supply of lutetium at the time. Pure lutetium metal was first
produced in 1953. Cerium-doped lutetium oxyorthosilicate (LSO) is currently
the preferred compound for detectors in positron emission tomography (PET)
The winner of the quiz is Leland Woodall and he will get the services
of Clumpy
and Kloumpios for the week.
So far Clumpy and Kloumpios have done the following:
Past Quiz winners/tasks:
Week 1 Ravinder Ajmani, Western Digital
Week 1 Ron Feyereisen, SigmaTron Intl.
Week 2 Louis Hart, Compunetics
Week 3 Mark Kostinovsky, Schlumberger Ltd.
Week 3 John Burke
Week 4 Drew Meyer, Benchmark Electronics
Week 5 No Winner - no correct responses!
Week 6 Bhanu Sood, NASA
Week 7 Keith Calhoun, Sopark Corp
Week 7 Ian Fox, Rolls Royce
Week 8 Leland Woodall
Week 8 David Bealer, SMT
Week 9 Tom Carroll, Boeing
Week 10 Louis Hart, Compunetics
Week 11 Tom Carroll, Boeing
Week 11 Scott Decker, UTAS
Week 12 Matthias Mansfeld, Mansfeld Elektronik PCB Design and Assembly
Week 13 No Quiz,
Week 14 Matthias Mansfeld, Mansfeld Elektronik PCB Design and Assembly
Week 15 Bhanu Sood, NASA
Week 16 John Maxwell
Week 17 Leland Woodall
Week 18 Leland Woodall
Week 19 Tom Carroll, Boeing
Week 20 Robert Kondner
Week 21 Tom Brendlinger, ClearMotion Inc.
Week 22 Carl Van Wormer, Cipher Engineering LCC
Week 23 Juliano Ribeiro, DATACOM
Week 24 Gerry Gagnon, FLIR Commercial Systems
Week 25 Graham Collins, Sunsel Systems
Week 26 Joyce Koo, IPC International
Week 26 Todd MacFadden, Bose
Week 27 Bhanu Sood, NASA
Week 28 Leland Woodall
Week 29 Mordechai Kirshenbaum
Week 30 Leland Woodall
Week 31 Leland Woodall
Week 32 Steve Gregory
Week 33 Leland Woodall
Week 34 Jerry Dengler, Pergamon Corp
Week 35 Frank Kimmey, VeriFone Inc
Week 36 Graham Collins, Sunsel Systems
Week 37 Richard "Dean" Stadem
Week 38 Leland Woodall
Week 38 Tom Carroll
Week 39 Matthias Mansfeld, Mansfeld Elektronik PCB Design and Assembly
Week 40 Leland Woodall
Week 41 Tom Carroll
Week 42 Matthias Mansfeld, Mansfeld Elektronik PCB Design and Assembly
Week 43 Joyce Koo
Week 44 Russell Kido, Practical Components
Week 45 Leland Woodall
Week 45 Frank Kimmey, VeriFone Inc
Week 46 Ian Fox, Rolls-Royce Control Systems
Week 47 Fred Cox, Bluering Stencils
Week 48 Tom Carroll, Boeing
Week 49 Todd MacFadden, Bose
Week 49 Leland Woodall
Week 50 Russell Kido, Practical Components
- They can help me this week prepare for Valentine's Day. I'm sure they
are great cooks!! They can also babysit my daughter. (Should I trust
them?) I can also use some assistance with my Apex preparations and
meetings as well as for wafer and substrate packing for the show. Too bad
I couldn’t have them for setting up our booth in a couple of weeks.
Week 51 Ravinder Ajmani, Western Digital
- I have a hectic week ahead, and I can really use help from the boys. I
don't know much about their computer skills, but I need to carry out lot of
simulation work. Since the work is mostly routine, I am sure they can pick
it up fast. Then there are ESD measurements to be done. Since we are
closed on Monday, they can enjoy long weekend with their families, and show
up on Tuesday.
Week 52 Leland Woodall
- assisted with ????
I hope everyone has a awesome week!
Dave Hillman
Rockwell Collins
[log in to unmask]
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