Major advantage of lead shield is in its compactness due to its higher density. The chemical symbol for Calcium is Ca. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. 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 |. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure.    Melting Point Cerium is also traditionally considered one of the rare-earth elements. The chemical symbol for Ytterbium is Yb. [Xe] 6s2 for barium). The chemical symbol for Titanium is Ti. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Nickel belongs to the transition metals and is hard and ductile. It is a soft, silvery-white alkali metal. The chemical symbol for Iron is Fe. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. The chemical symbol for Neodymium is Nd. Why don't libraries smell like bookstores? Electron configuration of Krypton is [Ar] 3d10 4s2 4p6. 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. Around 8 tons of krypton is produced each year world wide. 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. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). The chemical symbol for Californium is Cf. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Platinum is one of the least reactive metals. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Many times it is necessary to see all the quantum numbers in an electron configuration, this the purpose of the orbital diagram. Krypton has atomic number 36 and electron configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6or simply,[Ar] 3d10 4s2 4p6The electron configuration of krypton is: [Ar]3d10 4s2 4p6. Oxidation state 0 occurs for all elements – it is simply the element in its elemental form. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Copyright © 2020 Multiply Media, LLC. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Holmium is a part of the lanthanide series, holmium is a rare-earth element. It is one of the least reactive chemical elements and is solid under standard conditions.