by Jaylen Spangler
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
Malleability: Malleable but not for that useHardness: High
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.
It was first produced in 1937.
It was made first in Italy.
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.
- 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.