Diary store providers multiple free services with 100% confidentiality such as e-Diary, Education, Family & Friends, Inspiration, Health & Beauty and Tour. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. 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. There are 22 known isotopes of argon ranging from Ar-31 to Ar-51 and Ar-53. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Discoverer: Davy, Sir H. and Thénard, L.-J. What is atomic number 18? 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. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The chemical symbol for Lutetium is Lu. 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. Argon is used in gas welding and cutting. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. The chemical symbol for Rhenium is Re. Atomic Number – Does it conserve in a nuclear reaction? The chemical symbol for Fermium is Fm. The chemical symbol for Holmium is Ho. It is used in welding as well as in light and fluorescent bulbs. Argon (18 Ar) has 26 known isotopes, from 29 Ar to 54 Ar and 1 isomer (32m Ar), of which three are stable (36 Ar, 38 Ar, and 40 Ar). The chemical symbol for Silicon is Si. 1s 2 2s 2 2p 6 3s 2 3p 6 The chemical symbol for Beryllium is Be. There are seven isotopes of Ar  with mass numbers starting from 36 to 42. The chemical symbol for Radon is Rn. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Argon is a noble gas with element symbol Ar and atomic number 18. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. The chemical symbol for Promethium is Pm. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The chemical symbol for Berkelium is Bk. Neodymium is a soft silvery metal that tarnishes in air. Uranium is a silvery-white metal in the actinide series of the periodic table. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. You will also learn what argon is for and you will learn what its uses are through its properties associated with argon, such as its atomic number or the usual state in which argon can be found. The chemical symbol for argon is Ar. © 2020 Diary Store. It is fairly soft and slowly tarnishes in air. Technetium is the lightest element whose isotopes are all radioactive; none are stable.