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The Element Technetium


"The Atom"

Definition of the Technetium Element
Technetium is a silvery-gray metal that tarnishes slowly in moist air. A radioactive metal, the first synthetically produced element, used as a tracer and to inhibit corrosion in steel. The Atomic Number of this element is 43 and the Element Symbol is Tc.

The Properties of the Technetium Element
Symbol of Element : Tc
Atomic Number: 43
Atomic Mass: (98.0) amu
Melting Point: 2200.0 C - 2473.15 K
Boiling Point: 4877.0 C - 5150.15 K
Number of Protons/Electrons: 43
Number of Neutrons in Technetium : 55
Crystal Structure: Hexagonal
Density @ 293 K: 11.5 g/cm3
Color : Unknown

Origin / Meaning of the name Technetium
The name originates from the Greek word 'technetos' meaning artificial

Periodic Table Group and Classification of the of the Technetium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Technetium is classified as a "Transition Metal" which are located in Groups 3 - 12 of the Periodic Table. Elements classified as Transition Metals are generally described as ductile, malleable, and able to conduct electricity and heat. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

Facts about the History and the Discovery of the Technetium Element
Technetium was discovered by Emilio Segre and Carlo Perrier in 1937 in Italy. Technetium was the first element to be artificially produced.

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

Occurrence of the Technetium Element
Man-made but some red giant stars contain an emission line in their spectrum corresponding to the presence of technetium.

Abundances of the element in different environments
% in Universe N/A
% in Sun None
% in Meteorites None
% in Earth's Crust None
% in Oceans None
% in Humans None

Associated Uses of Technetium
Rust preventative
Radioactive tracing in medicine

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