- transuranium element
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transuranium element
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transuranium element — Any of the chemical elements after uranium in the periodic table (with atomic numbers greater than 92). All are radioactive (see radioactivity), with half lives ranging from tens of millions of years to fractions of a millisecond. Only two,… … Universalium
Transuranium element — In chemistry, transuranium elements (also known as transuranic elements) are the chemical elements with atomic numbers greater than 92 (the atomic number of uranium).Of the elements with atomic numbers 1 to 92, all but four (technetium,… … Wikipedia
transuranium element — n. transuranic element, chemical element with an atomic number greater than 92 (which is the atomic number of uranium) … English contemporary dictionary
Nuclear properties of selected transuranium element isotopes — ▪ Table Nuclear properties of selected transuranium element isotopes specific activity name and mass principal decay mode half life disintegrations per minute per microgram watts per gram* neptunium 237 alpha 2.14(106) years 1565 2.07(10−5)… … Universalium
element 118 — ▪ chemical element a transuranium element that occupies position 118 in the periodic table (periodic law) and one of the noble gases (noble gas). Element 118 is a synthetic element, and in 1999, scientists at Lawrence Berkeley National… … Universalium
element — /el euh meuhnt/, n. 1. a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis: Bricks and mortar are elements of every masonry wall. 2. Chem. one of a class of substances that cannot be separated… … Universalium
element, chemical — One of the 114 presently known kinds of substances that constitute all matter at and above the level of atoms (the smallest units of any element). All atoms of an element are identical in nuclear charge (number of protons) and number of electrons … Universalium
transuranium — trans·ura·ni·um (trans″u raґne əm) beyond uranium; see transuranic elements, under element … Medical dictionary
transuranium — adj. of or pertaining to an element having an atomic number greater than that of uranium (greater than 92) … English contemporary dictionary
chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… … Universalium
