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                      1. ▸▸
                        • 🇬🇧 Tantalum
                        • 🇨🇳 鉭
                        • 🇳🇱 Tantaal
                        • 🇫🇷 Tantale
                        • 🇩🇪 Tantal
                        • 🇮🇱 טנטלום
                        • 🇮🇹 Tantalio
                        • 🇯🇵 タンタル
                        • 🇵🇹 Tântalo
                        • 🇷🇺 Тантал
                        • 🇪🇸 Tántalo
                        • 🇸🇪 Tantal

                        Tantalum: the essentials

                        Tantalum atoms have 73 electrons and the shell structure is 2.8.18.32.11.2. The ground state electronic configuration of neutral tantalum is [Xe].4f14.5d3.6s2 and the term symbol of tantalum is 4F3/2.

                        Tantalum: description  

                        Tantalum is a greyish silver, heavy, and very hard metal. When pure, it is ductile and can be drawn into fine wire, which can be used as a filament for evaporating metals such as aluminium. Tantalum is almost completely immune to chemical attack at temperatures below 150°C, and is attacked only by hydrofluoric acid, acidic solutions containing the fluoride ion, and free sulphur trioxide. The element has a melting point exceeded only by tungsten and rhenium.

                        tantalum sheet
                        网络斗地主下载 Small and large samples of tantalum wire like this, as well as foil, sheet, insulated wire, mesh and rod, can be purchased via their web catalogue from via their web catalogue.

                        Tantalum: physical properties

                        More physical properties...

                        Tantalum: heat properties

                        More thermochemical properties...

                        Tantalum: atom sizes

                        More atomc size properties...

                        Tantalum: electronegativities

                        More electronegativity properties...

                        Tantalum: orbital properties

                        More orbital properties...

                        Tantalum: abundances

                        More geological data...

                        Tantalum: crystal structure

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

                        More crystallographic data...

                        Tantalum: biological data

                        Tantalum has no biological role. Possibly some tantalum compounds cause tumours.

                        More biological data...

                        Tantalum: uses

                        Uses...

                        Tantalum: reactions

                        网络斗地主下载 Reactions of tantalum as the element with air, water, halogens, acids, and bases where known.

                        View reactions of tantalum...

                        Tantalum: binary compounds

                        网络斗地主下载 Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of tantalum where known.

                        View binary compounds...

                        Tantalum: compound properties

                        网络斗地主下载 Bond strengths; lattice energies of tantalum halides, hydrides, oxides (where known); and reduction potentials where known.

                        View compound properties...

                        Tantalum: history

                        Tantalum was discovered by Anders Ekeberg in 1802 at Sweden. Origin of name: from the Greek word "Tantalos" meaning "father of Niobe" (Greek mythology, (tantalum is closely related to niobium in the periodic table).

                        More history...

                        Tantalum: isotopes

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

                        Tantalum has only two isotopes and one of them, Ta-180, has one of the lowest natural abundances of all naturally occurring isotopes (0.012%). Ta-180 has only been produced in minute quantities and is very expensive. Ta-181 can be used for the production of W-178 which decays to Ta-178. Ta-178 emits low energy gamma rays which can be used for imaging purposes.

                        More isotope and NMR data...

                        Tantalum: isolation

                        Isolation: isolation of tantalum appears to be complicated. Tantalum minerals usually contain both niobium and tantalum. Since they are so similar chemically, it is difficult to separate them. Tantalum can be extracted from the ores by first fusing the ore with alkali, and then extracting the resultant mixture into hydrofluoric acid, HF. Current methodology involves the separation of tantalum from these acid solutions using a liquid-liquid extraction technique. In this process tantalum salts are extracted into the ketone MIBK (methyl isobutyl ketone, 4-methyl pentan-2-one). The niobium remains in the HF solution.

                        网络斗地主下载After conversion to the oxide, metallic tantalum can be made by reduction with sodium or carbon. Electrolysis of molten fluorides is also used.

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