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Very few properties of rutherfordium or its compounds have been measured; this is due to its extremely limited and expensive production [70] and the fact that rutherfordium (and its parents) decays very quickly. A few singular chemistry-related properties have been measured, but properties of rutherfordium metal remain unknown and only ...
Rutherfordium is expected to be a solid under normal conditions and have a hexagonal close-packed crystal structure (c / a = 1.61), similar to its lighter congener hafnium. [33] It should be a metal with density ~17 g/cm 3. [44] [45] The atomic radius of rutherfordium is expected to be ~150 pm.
Its alpha radiation is rather weak (1.45 × 10 −3 % with respect to β-radiation), but is sometimes used to detect this isotope. 247 Bk is an alpha-emitter with a long half-life of 1,380 years, but it is hard to obtain in appreciable quantities; it is not formed upon neutron irradiation of plutonium because β-decay of curium isotopes with ...
Vernon [200] uses the term "frontier metal" to refer to the class of chemically weak metals adjacent to the dividing line between metals. He notes that several of them "are further distinguished by a series of… knight's move relationships, formed between one element and the element one period down and two groups to its right."
When an alkali metal is dropped into water, it produces an explosion, of which there are two separate stages. The metal reacts with the water first, breaking the hydrogen bonds in the water and producing hydrogen gas; this takes place faster for the more reactive heavier alkali metals. Second, the heat generated by the first part of the ...
Most definitions of the term 'refractory metals' list the extraordinarily high melting point as a key requirement for inclusion. By one definition, a melting point above 4,000 °F (2,200 °C) is necessary to qualify, which includes iridium, osmium, niobium, molybdenum, tantalum, tungsten, rhenium, rhodium, ruthenium and hafnium. [2]
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 February 2025. Periodic table of the elements with eight or more periods Extended periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium ...
The Joint Institute for Nuclear Research in Dubna (then USSR, today Russia) named element 104 kurchatovium (Ku) in honor of Igor Kurchatov, father of the Soviet atomic bomb, while the University of California, Berkeley, US, named element 104 rutherfordium (Rf) in honor of Ernest Rutherford.