NationMaster - Encyclopedia: Untriennium

Untriennium (IPA: /ʌntrʌɪˈɛniəm/, also called eka-actinium or dvi-lanthanum) is an unsynthesized chemical element with atomic number 139 and symbol Ute. General Name, Symbol, Number untrioctium, Uto, 138 Chemical series Superactinides Group, Period, Block g18, 8, g Appearance ? Image:.jpg Standard atomic weight [366] u (supposition) gÂ·molâˆ’1 Electron configuration [Uuo] 5g18 8s2 Electrons per shell 2, 8, 18, 32, 50, 18, 8, 2 Physical properties Phase presumably solid Miscellaneous... General Name, Symbol, Number actinium, Ac, 89 Chemical series actinides Group, Period, Block 3, 7, f Appearance silvery Atomic mass (227) gÂ·molâˆ’1 Electron configuration [Rn] 6d1 7s2 Electrons per shell 2, 8, 18, 32, 18, 9, 2 Physical properties Phase solid Density (near r. ... Image File history File links -TableImage. ... This is a standard display of the periodic table of the elements. ... An extended periodic table was suggested by Glenn T. Seaborg in 1969. ... This is a list of chemical elements, sorted by name and color coded according to type of element. ... Categories: Chemical elements ... A group, also known as a family, is a vertical column in the periodic table of the chemical elements. ... Superactinides are the undiscovered chemical elements from number 123 (Unbitrium) until 153 (Unpenttrium), at which the 5g and 6f- electron shells are filled up. ... A group, also known as a family, is a vertical column in the periodic table of the chemical elements. ... In the periodic table of the elements, a period is a horizontal row of the table. ... A block of the periodic table of elements is a set of adjacent groups. ... A Group 3 element is an element in periodic table group 3 (IUPAC style) in the periodic table, which consists of: scandium (21) yttrium (39) lanthanum (57) - lutetium (71) actinium (89) - lawrencium (103) All of these elements are classed in Group 3 because their outer shell holds three electrons. ... A period 8 element is one of the chemical elements in the eighth row (or period) of the periodic table of the elements. ... The f-block of the periodic table of elements consists of those elements for which, in the atomic ground state, the highest-energy electrons occupy f-orbitals. ... Color is an important part of the visual arts. ... The atomic mass (ma) is the mass of an atom at rest, most often expressed in unified atomic mass units. ... The unified atomic mass unit (u), or Dalton (Da), is a small unit of mass used to express atomic and molecular masses. ... Electron atomic and molecular orbitals In atomic physics and quantum chemistry, the electron configuration is the arrangement of electrons in an atom, molecule, or other physical structure (eg, a crystal). ... General Name, Symbol, Number ununoctium, Uuo, 118 Chemical series noble gases Group, Period, Block 18, 7, p Appearance unknown, probably colorless Atomic mass predicted, (314) g/mol Electron configuration perhaps [Rn] 5f14 6d10 7s2 7p6 (guess based on radon) Electrons per shell 2, 8, 18, 32, 32, 18, 8 Phase... e- redirects here. ... [[Image:Valence shell 011 Sodiumup of one or more electron subshells, or sublevels, which have two or more orbitals with the same angular momentum quantum number l. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... Isotopes are any of the several different forms of an element each having different atomic mass (mass number). ... Natural abundance refers to the prevalence of different isotopes of an element as found in nature. ... Half-Life For a quantity subject to exponential decay, the half-life is the time required for the quantity to fall to half of its initial value. ... Radioactive decay is the process in which an unstable atomic nucleus loses energy by emitting radiation in the form of particles or electromagnetic waves. ... The decay energy is the energy released by a nuclear decay. ... The electronvolt (symbol eV) is a unit of energy. ... In nuclear physics, a decay product, also known as a daughter product, is a nuclide resulting from the radioactive decay of a parent or precursor nuclide. ... Recommended values for many properties of the elements, together with various references, are collected on these data pages. ... Articles with similar titles include the NATO phonetic alphabet, which has also informally been called the â€œInternational Phonetic Alphabetâ€. For information on how to read IPA transcriptions of English words, see IPA chart for English. ... Professor Dimitri Mendeleev published the first Periodic Table of the Atomic Elements in 1869 based on properties which appeared with some regularity as he laid out the elements from lightest to heaviest. ... General Name, Symbol, Number actinium, Ac, 89 Chemical series actinides Group, Period, Block 3, 7, f Appearance silvery Atomic mass (227) gÂ·molâˆ’1 Electron configuration [Rn] 6d1 7s2 Electrons per shell 2, 8, 18, 32, 18, 9, 2 Physical properties Phase solid Density (near r. ... Professor Dimitri Mendeleev published the first Periodic Table of the Atomic Elements in 1869 based on properties which appeared with some regularity as he laid out the elements from lightest to heaviest. ... General Name, Symbol, Number lanthanum, La, 57 Chemical series lanthanides Group, Period, Block 3, 6, f Appearance silvery white Atomic mass 138. ... The periodic table of the chemical elements A chemical element, or element for short, is a type of atom that is defined by its atomic number; that is, by the number of protons in its nucleus. ...

The name untriennium is a temporary IUPAC systematic element name. The International Union of Pure and Applied Chemistry (IUPAC) is an international non-governmental organization devoted to the advancement of chemistry. ... In chemistry, heavy transuranic elements receive a permanent trivial name and symbol only after their synthesis has been confirmed. ...

History

The name untriennium is used as a placeholder, as in scientific articles about the search for element 139. Transuranic elements (those beyond uranium) are, except for microscopic quantities and except for Plutonium, always artificially produced, and usually end up being named for a scientist or the location of a laboratory that does work in atomic physics (see systematic element name for more information). For the World of Warcraft ex-NPC, see Captain Placeholder. ... In chemistry, transuranium elements (also known as transuranic elements) are the chemical elements with atomic numbers greater than 92, the atomic number of Uranium. ... General Name, symbol, number uranium, U, 92 Chemical series actinides Group, period, block n/a, 7, f Appearance silvery gray metallic; corrodes to a spalling black oxide coat in air Standard atomic weight 238. ... In chemistry, heavy transuranic elements receive a permanent trivial name and symbol only after their synthesis has been confirmed. ...

Significance

It is the first element with a filled type G electron shell, holding 18 electrons, and an electron in the overlaying type F orbital, in its ground state. The g-block of the periodic table of elements consists of those elements for which, in the atomic ground state, the highest-energy electrons occupy g-orbitals. ... [[Image:Valence shell 011 Sodiumup of one or more electron subshells, or sublevels, which have two or more orbitals with the same angular momentum quantum number l. ... The f-block of the periodic table of elements consists of those elements for which, in the atomic ground state, the highest-energy electrons occupy f-orbitals. ...

External links

See also

Categories: Chemical elements | Nuclear physics General Name, Symbol, Number lanthanum, La, 57 Chemical series lanthanides Group, Period, Block 3, 6, f Appearance silvery white Atomic mass 138. ... General Name, Symbol, Number untriennium, Ute, 139 Chemical series Group, Period, Block 3, 8, f Appearance ? Image:.jpg Atomic mass ? g/mol Electron configuration Electrons per shell Physical properties Phase presumably solid Miscellaneous Notable isotopes References Untriennium (eka-actinium/dvi-lanthanum) is an unsynthesized chemical element with atomic number 139... Eka is a prefix for a chemical element which is listed in the periodic table under another element. ... General Name, Symbol, Number cerium, Ce, 58 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white Atomic mass 140. ... General Name, Symbol, Number actinium, Ac, 89 Chemical series actinides Group, Period, Block 3, 7, f Appearance silvery Atomic mass (227) gÂ·molâˆ’1 Electron configuration [Rn] 6d1 7s2 Electrons per shell 2, 8, 18, 32, 18, 9, 2 Physical properties Phase solid Density (near r. ... General Name, Symbol, Number unbinilium, Ubn, 120 Chemical series Presumably Alkali earths Group, Period, Block 2, 8, s Appearance unknown, probably metallic and silvery white or grey colour Image:.jpg Atomic mass [297] amu (a guess) g/mol Electron configuration Uuo 8s2 (a guess based upon barium and radium) Electrons... Eka-actinium can mean: Unbiunium, first of the eka-actinoid series Untriennium, last of the eka-actinoid series This is a disambiguation page, a list of pages that otherwise might share the same title. ... Eka-thorium can be: Unbibium (Ubb), unsynthesized chemical element with atomic number 122. ... General Name, Symbol, Number seaborgium, Sg, 106 Chemical series transition metals Group, Period, Block 6, 7, d Appearance unknown, probably silvery white or metallic gray Atomic mass (266) g/mol Electron configuration perhaps [Rn] 5f14 6d4 7s2 (guess based on tungsten) Electrons per shell 2, 8, 18, 32, 32, 12... Eka is a prefix for a chemical element which is listed in the periodic table under another element. ... General Name, Symbol, Number bohrium, Bh, 107 Chemical series transition metals Group, Period, Block 7, 7, d Appearance unknown, probably silvery white or metallic gray Atomic mass (264) g/mol Electron configuration perhaps [Rn] 5f14 6d5 7s2 (guess based on rhenium) Electrons per shell 2, 8, 18, 32, 32, 13... General Name, Symbol, Number hassium, Hs, 108 Chemical series transition metals Group, Period, Block 8, 7, d Appearance unknown, probably silvery white or metallic gray Atomic mass (269) g/mol Electron configuration perhaps [Rn] 5f14 6d6 7s2 (guess based on osmium) Electrons per shell 2, 8, 18, 32, 32, 14... General Name, Symbol, Number untrioctium, Uto, 138 Chemical series Superactinides Group, Period, Block g18, 8, g Appearance ? Image:.jpg Standard atomic weight [366] u (supposition) gÂ·molâˆ’1 Electron configuration [Uuo] 5g18 8s2 Electrons per shell 2, 8, 18, 32, 50, 18, 8, 2 Physical properties Phase presumably solid Miscellaneous...

Contents

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Significance

External links

See also

History