Technetium was discovered in 1937 by Italian scientists, though it had been mistakenly reported as discovered earlier. It is a man-made radioactive element produced by bombarding molybdenum with neutrons. Technetium has no stable isotopes and is used as a radioactive tracer in medical diagnostic tests due to its low cost.

2.  Technetium was mistakenly
reported as having been
discovered in 1925. At this
time, it was named masurium.
 The element was actually
discovered in 1937 by C.
Perrier and Emilio Gino Segre
in Italy.
 The origin of the name
Technetium comes from the
Greek technetos, artificial.

3.  Technetium is a solid at room
temperature.
 The color of technetium is silver/gray.
 Melting point: 2200°C
Boiling Point: 4877°C
 Density: 11.5 g.cm-3 at 20°C
 Technetium is one of only two
elements that has no stable isotopes;
all of them are radioactive. Some
isotopes are produced as uranium
fission products.

4.  Technetium was the first artificially
produced element. It was created by
bombarding molybdenum atoms with
neutrons.
 Today, this is still how we produce
technetium. When molybdenum
captures a neutron, it decays into
technetium.
 The cost of technetium is around $60 per
gram.

5.  Technetium-99 is used in
many medical
radioactive isotope
tests. Technetium-99 has
also been proposed for
use in optolectric
nuclear batteries.
 One of Techntium's
more useful uses is as a
radioactive tracer that
can be distributed
throughout the body.

6.  http://www.chemistry.pomona.edu/chemistry/
periodic_table/Elements/Technetium/uses.html
 http://www.webelements.com/technetium/hist
ory.html
 http://www.lenntech.com/periodic/elements/t
c.htm#Atomic%20number
 http://chemistry.about.com/od/elementfacts/
a/technetium.htm
 http://education.jlab.org/itselemental/ele043.h
tml
 http://www.hobart.k12.in.us/ksms/PeriodicTabl
e/technetium.htm