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                        • ▸▸
                          • 🇬🇧 Protactinium
                          • 🇨🇳 鏷
                          • 🇳🇱 Protactinium
                          • 🇫🇷 Protactinium
                          • 🇩🇪 Protactinium
                          • 🇮🇱 פרוטקטיניום
                          • 🇮🇹 Protoattinio
                          • 🇯🇵 プロトアクチニウム
                          • 🇵🇹 Protactínio
                          • 🇷🇺 Протактиний
                          • 🇪🇸 Protactinio
                          • 🇸🇪 Protaktinium

                          Protactinium: the essentials

                          Protactinium atoms have 91 electrons and the shell structure is 2.8.18.32.20.9.2. The ground state electronic configuration of neutral protactinium is [Rn].5f2.6d1.7s2 and the term symbol of protactinium is 4K11/2.

                          Protactinium: description  

                          Protactinium has a bright metallic lustre which it retains for some time in air. The element is superconductive below 1.4 K. The element is a dangerous toxic material and requires precautions similar to those used when handling plutonium. Protactinium is one of the rarest and most expensive naturally occurring elements. The element is an α-emitter and is a radiological hazard similar to polonium. Protactinium is a highly toxic and radioactive rare earth metal that requires special handling. It is found in pitchblende and ores form Zaire and is one of the rarest and most expensive naturally occurring elements.

                          protactinium
                          This sample of uraninite contains some about 10-6 grammes of actinium at any one time. Image adapted with permission from 's (U. North Texas, USA) Walking Tour of the elements CD.

                          Protactinium: physical properties

                          More physical properties...

                          Protactinium: heat properties

                          More thermochemical properties...

                          Protactinium: atom sizes

                          More atomc size properties...

                          Protactinium: electronegativities

                          More electronegativity properties...

                          Protactinium: orbital properties

                          More orbital properties...

                          Protactinium: abundances

                          More geological data...

                          Protactinium: crystal structure

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

                          More crystallographic data...

                          Protactinium: biological data

                          Protactinium has no biological role.

                          More biological data...

                          Protactinium: uses

                          Uses...

                          Protactinium: reactions

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

                          View reactions of protactinium...

                          Protactinium: binary compounds

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

                          View binary compounds...

                          Protactinium: compound properties

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

                          View compound properties...

                          Protactinium: history

                          Protactinium was discovered by Otto Hahn, Lise Meitner, Frederick Soddy, John Cranston in 1913 at Germany, England. Origin of name: from the Greek word "protos" meaning "first".

                          More history...

                          Protactinium: isotopes

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

                          More isotope and NMR data...

                          Protactinium: isolation

                          Isolation: coming soon!

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