Berkelium is a member of the actinide and transuranium element series. The chemical symbol for Arsenic is As. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. Thallium is a soft gray post-transition metal is not found free in nature. The unit of measure for mass is the atomic mass unit (amu). It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. Join Yahoo Answers and get 100 points today. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs).

Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure.

Each nuclide is denoted by chemical symbol of the element (this specifies Z) with tha atomic mass number as supescript. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas.

Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. The chemical symbol for Bromine is Br.

Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. The chemical symbol for Calcium is Ca. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Tellurium is far more common in the universe as a whole than on Earth. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table.

Yes, 17. The chemical symbol for Radium is Ra. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert.

Define atomic number, mass number, and atomic... How many electrons are in the isotope 4620Ca? Atomic Mass Number – Does it conserve in a nuclear reaction? 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. To determine the stability of an isotope you can use the ratio neutron/proton (N/Z). Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table.

Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. is a rare earth element with a metallic silver luster. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust.

Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure.

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