Technetium (Tc)

Atomic Number: 43

Relative Atomic Mass: About 98

Electronegativity: 1.90

Atomic Radius (Picometers): 135

Appearance: Silver-Grey

Occurrence: Decay

Melting Point (Kelvin): 2430

Boiling Point (Kelvin): 4538

Stable Isotopes: None

Discoverers: Carlo Perrier and Emilio Segre in 1937

Properties: Radioactive

First Use: Medical (Unknown)

Modern Uses: Industrial, Chemical

Picture Courtesy of United States Government

©2011 Grant Dwyer