Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The chemical symbol for Titanium is Ti. Neurodevelopmental Disorders in Children: Autism & ADHD, Mercury in Fish vs. the Benefits of Fish Oils, Norwegian Farmed Salmon Raises Global Concern. (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). The chemical symbol for Arsenic is As. Krypton is a member of group 18 (noble gases) elements. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. The chemical symbol for Helium is He. Comprehensive data on the chemical element Protactinium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Protactinium. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. However, the metal is dangerous to handle because it and its compounds are both toxic and radioactive. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Two isotopes of protactinium Pa-231 and Pa-234 occur naturally. Its properties are thus intermediate between those of chlorine and iodine. Cerium is the second element in the lanthanide series. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Protactinium was first identified by Kasimir Fajans and O.H. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Lead is widely used as a gamma shield. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Under standard conditions, it is the lightest metal and the lightest solid element. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Francium is a highly radioactive metal that decays into astatine, radium, and radon. 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”. 6d1. Printed from https://EnvironmentalChemistry.com, Molar Mass Calculations and Javascript Calculator, Nitrogen Dioxide, Ozone & Lead Partner to Increase Pollution Dangers to Urban Children, Nanotech-cleantech: bridging the gap to real sustainability, ADA Recommendation for Fluoride in Infant Diets, Asbestos, a Brief History its Uses & Health Risks, Asbestos, its Chemical & Physical Properties, Asbestos: A Manufacturing Health Hazard Dating to Prehistoric Times. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Titanium can be used in surface condensers. This fact has key implications for the building up of the periodic table of elements. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. The chemical symbol for Tin is Sn. The chemical symbol for Xenon is Xe. and Gay-Lussac, L.-J. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. The chemical symbol for Indium is In. The information contained in this website is for general information purposes only. They called the element ‘brevium’ because the isotope they had found (protactinium-234) has a very short half-life (1.17 minutes). Electronic configuration. The chemical symbol for Thallium is Tl. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. The chemical symbol for Bromine is Br. Thulium is an easily workable metal with a bright silvery-gray luster. The chemical symbol for Barium is Ba. Carbon is one of the few elements known since antiquity. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. The chemical symbol for Silver is Ag. The chemical symbol for Europium is Eu. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. Protactinium metal is a shiny, radioactive and silvery metal that degrades slowly in the presence of air to form oxides. Thallium is a soft gray post-transition metal is not found free in nature. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies. In the case of Protactinium the abbreviated electron configuration is [Rn] 5f2 6d1 7s2. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. 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. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. The portion of Protactinium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. The information on this site has been compiled from a number of sources. Iron is a metal in the first transition series. In nuclear reactors, promethium equilibrium exists in power operation. Protactinium Properties. Protactinium atoms have 91 electrons and the shell structure is 2.8.18.32.20.9.2. Includes Concise Form of Electron Configuration Notation and Protactinium (Pa). Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. 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 … Electron configuration 5f 2 6d 1 7s 2: Electrons per shell: 2, 8, 18, 32, 20, 9, 2: Physical properties; Phase at STP: solid: Melting point: 1841 K (1568 °C, 2854 °F) Boiling point: 4300 K (4027 °C, 7280 °F) (?) The chemical symbol for Lead is Pb. Neodymium is a soft silvery metal that tarnishes in air. Europium is one of the least abundant elements in the universe. Our protactinium page has over 135 facts that span 55 different quantities. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Its boiling point is the lowest among all the elements. When an electron is added to a neutral atom, energy is released. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The chemical symbol for Copper is Cu. The subshells have a distinct shape and configuration, in which the electrons move freely. The chemical symbol for Cerium is Ce. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Oxidation state 0 occurs for all elements – it is simply the element in its elemental form. It is occasionally found in native form as elemental crystals. Answers many questions regarding the structure of atoms. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. We have also distinguish between the possible and common oxidation states of every element. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. The chemical symbol for Germanium is Ge. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The chemical symbol for Curium is Cm. Lead is soft and malleable, and has a relatively low melting point. Protactinium. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. The electron configuration can be visualized as the core electrons, equivalent to the noble gas of the preceding period, and the valence electrons (e.g. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. 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. The noble gas electron configuration is a type of shortcut to writing out the full electron configuration of an element. Zirconium is widely used as a cladding for nuclear reactor fuels. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Polish chemist Kasimir Fajans and German chemist Oswald Göhring discovered protactinium in 1913 at Karlsruhe, Germany. Neptunium is the first transuranic element. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. The chemical symbol for Holmium is Ho. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. is a rare earth element with a metallic silver luster. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Electron Configuration Number of Neutrons Melting Point Boiling Point Date of Discovery Crystal Structure. Pure germanium is a semiconductor with an appearance similar to elemental silicon. It is a soft, silvery-white alkali metal. The chemical symbol for Tantalum is Ta. The chemical symbol for Osmium is Os. Understand the noble gas electron configuration. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. In the periodic table, the elements are listed in order of increasing atomic number Z. Electron configuration of Protactinium is [Rn] 5f2 6d1 7s2. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. 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. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. In 1871, Dmitri Mendeleev predicted the existence of an element between thorium and uranium. Possible oxidation states are +4,5. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. The chemical symbol for Krypton is Kr. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. The chemical symbol for Mendelevium is Md. Radon is a radioactive, colorless, odorless, tasteless noble gas. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. 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. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. The name "protactinium" comes from adding the Greek protos meaning first, before the word "actinium." Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Compact Fluorescent Lights (CFLs): Are They Worth the Switch? Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. The chemical symbol for Aluminum is Al. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Göhring in 1913 while studying uranium's decay chain. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. The chemical symbol for Selenium is Se. A number of protactinium compounds are known, some of which are colored. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Einsteinium is the seventh transuranic element, and an actinide. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. The chemical symbol for Argon is Ar. The thermal expansion, electrical and thermal conductivities of these three elements are comparable and are typical of post-transition metals. Francium is an alkali metal, that has one valence electron. Crystal Structure: Orthorhombic. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. Copyright 1995 - 2021 Kenneth L Barbalace (. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. Group 12, zinc and mercury span 55 different quantities antimony is a member the! Optical properties typical member of group 18 ( noble gases electrical,,!, are often collectively known as quicksilver and was formerly named hydrargyrum other physical ). Known as “ samarium 149 has an important impact on the amount of electrons of an or... 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