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”. Mass numbers of typical isotopes of Sodium are 23. The chemical symbol for Antimony is Sb. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Tin is a post-transition metal in group 14 of the periodic table. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. 113Cd has specific absorption cross-section. The chemical symbol for Cadmium is Cd. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. The name samarium is after the mineral samarskite from which it was isolated. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium).  The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. The chemical symbol for Terbium is Tb. Use of this web site is restricted by this site's license It is occasionally found in native form as elemental crystals. The atomic mass is the mass of an atom. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure.    Crystal Structure, Element Groups: These relative weights computed from the chemical equation are sometimes called equation weights. Fermium is a member of the actinide series. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 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 mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Major advantage of lead shield is in its compactness due to its higher density. We assume no responsibility for consequences which may arise from the use of information from this website. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. In fact their absorption cross-sections are the highest among all stable isotopes. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Carbon is one of the few elements known since antiquity. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. agreement. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure.  Help At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure.  Links, Show Table With: Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. The chemical symbol for Praseodymium is Pr. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. This list contains the 118 elements of chemistry. Only about 5×10−8% of all matter in the universe is europium. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. The unity for atomic mass is gram per mol. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. Tellurium is far more common in the universe as a whole than on Earth. The chemical symbol for Technetium is Tc. It is a noble metal and a member of the platinum group. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Cerium is the second element in the lanthanide series. The chemical symbol for Uranium is U. Thulium is the thirteenth and third-last element in the lanthanide series. 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. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Einsteinium is the seventh transuranic element, and an actinide. The chemical symbol for Selenium is Se. Try our Molecular Weight Calculator! The chemical symbol for Thallium is Tl. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Atomic Mass: 12.0107 amu. Distributieweg 3 2645 EG Delfgauw The Netherlands Phone: +31 152 610 900 fax: +31 152 616 289 e-mail:, 5975 Sunset Drive South Miami, FL 33143 USA Phone: +1 877 453 8095 e-mail:, Level 5 - OFFICE #8-One JLT Tower Jumeirah Lake Towers Dubai - U.A.E. Approximately 60–70% of thallium production is used in the electronics industry. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. The chemical symbol for Rubidium is Rb. 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. The bulk properties of astatine are not known with any certainty. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. 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. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. is a rare earth element with a metallic silver luster. We can determine the neutron number of certain isotope. Europium is one of the least abundant elements in the universe. Pure radium is silvery-white alkaline earth metal. 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. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Chemical elements listed by atomic mass The elements of the periodic table sorted by atomic mass.    Transition Metals Pure germanium is a semiconductor with an appearance similar to elemental silicon. The chemical symbol for Einsteinium is Es. Neodymium is a soft silvery metal that tarnishes in air. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds.

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