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{{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | meltingpoint=3915 °F (2157 °C or 2430 K) | boilingpoint=7709 °F (4265 °C or 4538 K) | density=11 g/cm³ | class=Metallic | cstructure=Hexagonal | stableisotopes=0 | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emillo G. Segre | origname=from the Greek ''tekhnetos'', meaning ''artificial''. | uses=Source of radiation for medical research. | obtained=Manufactured by bombarding [[Molybdenum]] with [[heavy hydrogen]] in a [[cyclotron]]. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238. }}

{{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | meltingpoint=3915 °F (2157 °C or 2430 K) | boilingpoint=7709 °F (4265 °C or 4538 K) | density=11 g/cm³ | class=Metallic | cstructure=Hexagonal | stableisotopes=0 | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emillo G. Segre | origname=from the Greek ''tekhnetos'', meaning ''artificial''. | uses=Source of radiation for medical research. | obtained=Manufactured by bombarding [[Molybdenum]] with [[heavy hydrogen]] in a [[cyclotron]]. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238. }}

'''Technetium''' ''(tek-NEE-she-em)'' is a [[radioactive]], silvery-grey synthetic [[metal]]. Out of all the elements, it is the lightest one whose [[isotopes]] are all radioactive. It has a ([[beta radiation|beta]]) [[half-life]] of 4.2 million years.

'''Technetium''' ''(tek-NEE-she-em)'' is a [[radioactive]], silvery-grey synthetic [[metal]]. Out of all the elements, it is the lightest one whose [[isotopes]] are all radioactive. Its longest-lived isotope ⁹⁷Tc has a ([[beta radiation|beta]]) [[half-life]] of 4.2 million years.

==History==

==History==