Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Zirconium is widely used as a cladding for nuclear reactor fuels. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. 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 2020 Periodic Table | All Rights Reserved |. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Review 2000 (IUPAC Technical Report)", "Atomic weights of the elements 2005 (IUPAC Technical Report)",, Creative Commons Attribution-ShareAlike License. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. The element itself was isolated only recently. The chemical symbol for Selenium is Se. 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. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. The chemical symbol for Gadolinium is Gd. Radioactive Europium, Gadolinium, and Terbium Krisberg, N. L.; Pool, M. L.; Hibdon, Carl T. Abstract. Caesium has physical and chemical properties similar to those of rubidium and potassium. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Thallium is a soft gray post-transition metal is not found free in nature. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. The isotope has a half-life of 72 days and is commercially available. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Modern purification techniques for these lanthanoid salt mixtures are ingenious and involve selective complexation techniques, solvent extractions, and ion exchange chromatography. The chemical symbol for Dysprosium is Dy. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. The information contained in this website is for general information purposes only. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. The chemical symbol for Tantalum is Ta. Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. The chemical symbol for Californium is Cf. The chemical symbol for Rhodium is Rh. The chemical symbol for Sodium is Na. Thulium is the thirteenth and third-last element in the lanthanide series. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Use, Smithsonian The chemical symbol for Terbium is Tb. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Discoverer: Davy, Sir H. and Thénard, L.-J.