The chemical symbol for Thorium is Th. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Protactinium Properties. The chemical symbol for Silver is Ag. In 1913 the first isotope of element 91, 234Pa, was discovered by K. Fajans and O.H. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Europium is one of the least abundant elements in the universe. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. The mean radius of protactinium is 180 pm. Tellurium is chemically related to selenium and sulfur. Our protactinium page has over 135 facts that span 55 different quantities. The noble gas electron configuration is a type of shortcut to writing out the full electron configuration of an element. The chemical symbol for Chromium is Cr. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. It is also predicted that, unlike Cp{sub 3}UL complexes, which have more » a 5f{sup 3} electron configuration, 2 might have a 6d{sup 1}5f{sup 2} ground configuration. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Oxidation states are typically represented by integers which may be positive, zero, or negative. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. This database focuses on the most common chemical compounds used in the home and industry. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Use online or print pages out as classroom handouts. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Lead is widely used as a gamma shield. The chemical symbol for Americium is Am. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Electron configuration of Protactinium is [Rn] 5f2 6d1 7s2. The chemical symbol for Lithium is Li. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. The chemical symbol for Iridium is Ir. Electron Configuration: 1s 2 2s 2 p 6 3s 2 p 6 d 10 4s 2 p 6 d 10 f 14 5s 2 p 6 d 10 f 2 6s 2 p 6 d 1 7s 2. Characteristics of protactinium Platinum is one of the least reactive metals. Electronic configuration. The chemical symbol for Neon is Ne. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. The chemical symbol for Neptunium is Np. The chemical symbol for Curium is Cm. It was an intensely radioactive material, however, he could not characterize it as a new chemical element and thus named it uranium-X. Two isotopes of protactinium Pa-231 and Pa-234 occur naturally. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. The chemical symbol for Fermium is Fm. Protactinium has an atomic mass of 231.03588 u. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The chemical symbol for Ytterbium is Yb. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). The chemical symbol for Palladium is Pd. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The portion of Protactinium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. It occurs in all uranium ores to the extent of 0.34 part per million of uranium. Atomic Structure of Protactinium. Protactinium was first identified by Kasimir Fajans and O.H. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. The chemical symbol for Uranium is U. The number of electrons in each of Protactinium's shells is 2, 8, 18, 32, 20, 9, 2 and its electron configuration is [Rn] 5f 2 6d 1 7s 2. Common chemical compounds are also provided for many elements. Pure radium is silvery-white alkaline earth metal. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Each shell and subshell have a limitation on the amount of electrons that it can carry. 29 radio isotopes of protactinium have been characterized, with the most stable being 231 Pa with a half-life of 32,760 years. Göhring in 1913 while studying uranium's decay chain. Please share and/or link to this page if you find it useful or informative. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Under standard conditions, it is the lightest metal and the lightest solid element. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. The chemical symbol for Protactinium is Pa. Electron Configuration and Oxidation States of Protactinium. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. For example, silicon has nine possible integer oxidation states from −4 to +4, but only -4, 0 and +4 are common oxidation states. Astatine is the rarest naturally occurring element on the Earth’s crust. Electron configuration of every element in the periodic table # Element Electron configuration 1 Hydrogen 1s1 2 Helium 1s2 3 Lithium 1s22s1 4 Beryllium 1s22s2 5 Boron 1s22s22p1 6 Carbon 1s 22s22p 7 Nitrogen 1s 22s 2p3 8 Oxygen 1s22s22p4 9 Fluorine 1s22s22p5 10 Neon 1s22s22p6 11 Sodium 1s22s22p63s1 12 Magnesium 1s22s22p63s2 13 Aluminum 1s 22s 2p63s 3p1 14 Silicon … Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Prairie Dog Control: Non-Lethal Techniques. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. The chemical symbol for Tellurium is Te. Answers many questions regarding the structure of atoms. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. The chemical symbol for Bromine is Br. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. 1) You may use almost everything for non-commercial and educational use. Protactinium. Protactinium Properties. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Approximately 60–70% of thallium production is used in the electronics industry. The element is superconductive below 1.4K. The chemical symbol for Technetium is Tc. It is a noble metal and a member of the platinum group. A freshly exposed surface of pure copper has a reddish-orange color. (1),(2) Otto Hahn and Lise Meitner at the Kaiser Wilhelm Institute in Berlin, discovered a much longer lived isotope in 1917: protactinium-231 (half-life of 32 670 years). Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. The chemical symbol for Nickel is Ni. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. It is a Block F, Group 3, Period 7 element. The chemical symbol for Helium is He. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The particular isotope they found, protactinium-234 m, has a half-life of about 1.17 minutes.They named the element brevium, meaning brief, and then continued with their studies. Similarly, adding electrons results in a negative oxidation state. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Major advantage of lead shield is in its compactness due to its higher density. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Protactinium Element Properties. Thomas Jefferson. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Pure germanium is a semiconductor with an appearance similar to elemental silicon. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6 4f 14 5d 10 6s 2 6p 6 5f 2 6d 1 7s 2. The chemical symbol for Tantalum is Ta. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2021 Periodic Table | All Rights Reserved |. The information on this site has been compiled from a number of sources. Discoverer: Davy, Sir H. and Thénard, L.-J. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. It decays by alpha-emission. It is even less abundant than the so-called rare earths. Thulium is an easily workable metal with a bright silvery-gray luster. The discovery story of protactinium spans several years. Electron Configuration Number of Neutrons Melting Point Boiling Point Date of Discovery Crystal Structure. The chemical symbol for Molybdenum is Mo. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. It is the heaviest essential mineral nutrient. Although neodymium is classed as a rare earth, it is a fairly common element. Only about 5×10−8% of all matter in the universe is europium. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. However, the metal is dangerous to handle because it and its compounds are both toxic and radioactive. f: 90: Th: Thorium f: 91: Pa: Protactinium f: 92: U: Uranium General: Name (Protactinium) Symbol (Pa) Number (91) Group Number ... Electron Configuration ([Rn] 5f 2 6d 1 7s 2) Minimum Oxidation Number (0) Maximum Oxidation Number (5) Minimum Common Oxidation Number (0) This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Chemically, indium is similar to gallium and thallium. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Thorium - Electron Configuration and Oxidation States - Th, Actinium - Electron Configuration and Oxidation States - Ac, Radium - Electron Configuration and Oxidation States - Ra, Thorium – Electron Configuration and Oxidation States – Th, Uranium – Electron Configuration and Oxidation States – U. The chemical symbol for Lead is Pb. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Protactinium is an actinide which is positioned in the periodic table to the left of uranium and to the right of thorium, and many of its physical properties are intermediate between those two actinides. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. The chemical symbol for Californium is Cf. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. The thermal expansion, electrical and thermal conductivities of these three elements are comparable and are typical of post-transition metals. Githy.com. It was a very short-lived m… The chemical symbol for Platinum is Pt. Compact Fluorescent Lights (CFLs): Are They Worth the Switch? Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. Thorium is moderately hard, malleable, and has a high melting point. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Crystal Structure: Orthorhombic. Protactinium atoms have 91 electrons and the shell structure is 2.8.18.32.20.9.2. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. Nevertheless protactinium also shows a strong horizontal analogy with thorium and uranium in also displaying the +4 oxidation state, something that Mendeleev does not seem to have anticipated. 2) You may not distribute or commercially exploit the content, especially on another website. Neodymium is a soft silvery metal that tarnishes in air. Prairie Dogs: A Threatened Species or Public Health Nuisance? The chemical symbol for Argon is Ar. Group 18 ( noble gases ) elements you find it useful or informative nucleus consists of 91 protons and electrons. It useful or informative are 91 protons and 87 electrons in the atomic structure Discovery... Isotopes 155Gd and 157Gd tenth transuranic element and is used in the universe is europium a dense odorless! Rare Earth element with atomic number 89 which means there are 41 protons and 100 electrons in atomic. 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