In the end, Neptunium has not proved to be the most useful of elements. When it turns up in a nuclear reactor, or as the end product of the decay of americium in smoke detectors, it is regarded as waste, and it's a particularly long lasting, nasty waste with its immense 2 million year half life.

2023年12月28日 · Neptunium, which belongs to the actinide class of the Periodic Table, has an atomic number of 93. It lies between plutonium (94) and uranium (92). It was the first transuranium element to be created intentionally. The radioactive metal neptunium is silvery, ductile, and oxidizes in air.

Neptunium is the first transuranic element and belongs to actinide series. All transuranic elements are unstable and decay into other elements radioactively. It is represented by the symbol Np and has atomic number 93. Neptunium is a very reactive metal. It …

2010年10月22日 · Jim Ibers talks about neptunium, an element that has remained largely unnoticed despite the flurry of activity devoted to its neighbours in the periodic table, uranium and plutonium.

2023年2月25日 · Neptunium is a silver radioactive metal with atomic number 93 and element symbol Np. While you might think it’s an exotic element that you never encounter, it actually occurs in many smoke detectors as a decay product of americium-241. Here are interesting neptunium facts, including the its discovery, uses, sources, and health risks.

Explore the fascinating world of Neptunium, a radioactive actinide with unique properties and applications. Learn about its historical background, physical and chemical properties, important chemical reactions, potential uses, and safety measures. Understand its role in nuclear reactors and its significance in nuclear science research.

Neptunium is a silvery white metal with a melting point of 640°C (1,180°F) and a density of 20.45 grams per cubic centimeter. Neptunium is fairly reactive and forms some interesting compounds. Examples include neptunium dialuminide (NpAL 2 ) and neptunium beryllide (NpBe 3 ).

Neptunium is a silvery radioactive synthetic metal. (Miniscule quantities of neptunium-237 and neptunium-239 are found in nature as a result of beta decay of uranium.) Neptunium exists in three allotropes: it has an orthorhombic structure at normal temperatures, a tetragonal structure above 280 o C and a cubic structure above 577 o C. (2)

2024年10月2日 · Neptunium (chemical symbol Np, atomic number 93) is one of the more unusual and lesser-known elements on the periodic table. It is the first transuranic element, meaning it has a higher atomic number than uranium and is artificially produced.

What is neptunium, symbol, history, element properties (boiling point, melting point, atomic number, electron configuration), what is it used for