Technetium
by Jaylen Spangler
Physical Properties
Atomic Mass: 98
Atomic Radius in picometers (pm): 183pm
Density: 11.5 g/cc
Melting Point: 2157°C (3915°F 2430K)
Boiling Point: 4265°C (7709°F 4535K)
At room temperature (22°C), this element is a: Solid
Appearance: Gray metal
Conductivity: High
Malleability: Malleable but not for that use
Hardness: HighChemical Properties
Flammability: Low
Reactivity: Somewhat high
Radioactivity: Extremely high
It's atomic number, number of protons, and number of electrons is 43. It has 55 neutrons making its mass number 98. Technetium is located pretty much dead center of the periodic table in Block D, Group 7, Period 5.
When?
It was first produced in 1937.
Where?
It was made first in Italy.
Who?
The first people to discover/produce Technetium were two scientists named Carlo Perrier and Emilio Segrè.
Technetium was created by bombarding molybdenum atoms with deuterons that had been accelerated by a device called a cyclotron.
Technetium is most commonly used for gamma ray imaging of a skeleton because its short lived isotopes attach themselves to areas of bone growth.
Interesting info
The word technetium somes from the Greek word technitos which means artificial. Also, there is not a single stable isotope of technetium known to man.
Sources Cited
- Element Card: Gray, Theodore W. (2008). The Photographic Card Deck of the Elements.
- Elements Book: Gray, Theodore W. (2009). The Elements: A visual exploration of every known atom in the universe. New York: Black Dog & Leventhal Publishers, Inc.
- http://education.jlab.org/itselemental/ele043.html