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                                1. ▸▸
                                  • 🇬🇧 Technetium
                                  • 🇨🇳 鎝
                                  • 🇳🇱 Technetium
                                  • 🇫🇷 Technétium
                                  • 🇩🇪 Technetium
                                  • 🇮🇱 טכנטיום
                                  • 🇮🇹 Tecneto
                                  • 🇯🇵 テクネチウム
                                  • 🇵🇹 Tecnécio
                                  • 🇷🇺 Технеций
                                  • 🇪🇸 Tecnecio
                                  • 🇸🇪 Teknetium

                                  Technetium: the essentials

                                  Technetium atoms have 43 electrons and the shell structure is 2.8.18.14.1. The ground state electronic configuration of neutral technetium is [Kr].4d5.5s2 and the term symbol of technetium is 6S5/2.

                                  Technetium: description  

                                  Since its discovery, searches for the element technetium in terrestrial materials have been made without success. Technetium has been found in the spectrum of S-, M-, and N-type stars, and its presence in stellar matter is leading to new theories of the production of heavy elements in the stars.

                                  网络斗地主下载Technetium is a silvery-grey metal that tarnishes slowly in moist air. Until 1960, technetium was available only in small amounts. The chemistry of technetium is related to that of rhenium.

                                  technetium
                                  There is a thin plating of technetium-99 on this disk and this radioactive sample gives about 200 counts per minute. Image adapted with permission from 's (U. North Texas, USA) Walking Tour of the elements CD.

                                  Technetium: physical properties

                                  More physical properties...

                                  Technetium: heat properties

                                  More thermochemical properties...

                                  Technetium: atom sizes

                                  More atomc size properties...

                                  Technetium: electronegativities

                                  More electronegativity properties...

                                  Technetium: orbital properties

                                  More orbital properties...

                                  Technetium: abundances

                                  More geological data...

                                  Technetium: crystal structure

                                  Tc crystal structure
                                  The solid state structure of technetium is: bcc (body-centred cubic).

                                  More crystallographic data...

                                  Technetium: biological data

                                  Technetium has no biological role. Technetium does not occur naturally in the biosphere and so normally never presents a risk. All technetium compounds should be regarded as highly toxic, largely because of its radiological toxicity.

                                  More biological data...

                                  Technetium: uses

                                  Uses...

                                  Technetium: reactions

                                  Reactions of technetium as the element with air, water, halogens, acids, and bases where known.

                                  View reactions of technetium...

                                  Technetium: binary compounds

                                  Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of technetium where known.

                                  View binary compounds...

                                  Technetium: compound properties

                                  Bond strengths; lattice energies of technetium halides, hydrides, oxides (where known); and reduction potentials where known.

                                  View compound properties...

                                  Technetium: history

                                  Technetium was discovered by Carlo Perrier, Emilio Segre in 1937 at Italy. Origin of name: from the Greek word "technikos" meaning "artificial".

                                  More history...

                                  Technetium: isotopes

                                  Isotope abundances of technetium
                                  Isotope abundances of technetium with the most intense signal set to 100%.

                                  More isotope and NMR data...

                                  Technetium: isolation

                                  Isolation: it is never necessary to make a sample of techntium anywhere other than specialist laboratories. This is because technetium is radioactive. Technetium is a byproduct of the nuclear industry and is a product of uranium decay. Alternatively it can be made by the bombardment of molydenum targets with deuterium nuclei.

                                  Because of the scale of the nuclear industry it is possible to make quite large quantities of technetium (kilograms). The metal itself may be made by the reaction of the sulphide Tc2S7 with hydrogen at 1100°C or of the pertechnate NH4TcO4 with hydrogen.

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