For example, silicon has nine possible integer oxidation states from −4 to +4, but only -4, 0 and +4 are common oxidation states. Gold is a transition metal and a group 11 element. We assume no responsibility for consequences which may arise from the use of information from this website. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 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. 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. The chemical symbol for Radium is Ra. They are tabulated elsewhere on the WWW (reference 4) and in paper form (reference 5). For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. The chemical symbol for Lithium is Li. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The chemical symbol for Terbium is Tb. The chemical symbol for Thallium is Tl. The Cookies Statement is part of our Privacy Policy. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). The chemical symbol for Silicon is Si. WebElements: THE periodic table on the WWW [] Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. All of its isotopes are radioactive. is a rare earth element with a metallic silver luster. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. It is one of the least reactive chemical elements and is solid under standard conditions. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning.

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