121 Ubn ← unbiunium → Ubb ↑ Ubu ↓ Usu periodic table
General
Name, Symbol, Number	unbiunium, Ubu, 121
Chemical series	Not classifiable
Group, Period, Block	g1, 8, g
Appearance	unknown Image:.jpg
Atomic mass	[320] amu (supposition) g/mol
Electron configuration	[Uuo] 5g1 8s2
Electrons per shell	2, 8, 18, 32, 33, 18, 8, 2
Physical properties
Phase	presumably solid
Miscellaneous
Notable isotopes
Main article: Isotopes of unbiunium iso NA half-life DM DE (MeV) DP
References

Unbiunium (eka-actinium) is the temporary name of an undiscovered chemical element in the periodic table that has the temporary symbol Ubu and has the atomic number 121. 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 [318] amu (a guess) g/mol Electron configuration Uuo 8s2 (a guess based upon barium and radium) Electrons... File links The following pages link to this file: Americium Wikipedia talk:WikiProject Elements Berkelium Bohrium Curium Californium Einsteinium Fermium Lawrencium Mendelevium Neptunium Nobelium Plutonium Seaborgium Unbinilium Ununennium User:Maveric149 Unbihexium Unbiunium Unbibium Template:Unquadunium infobox Unbitrium Template:Unquadnilium infobox Untriseptium Categories: GFDL images ... For information about the period table of elements, see Periodic table. ... This is a list of chemical elements, sorted by name and color coded according to type of element. ... Categories: Chemical elements ... A chemical series is a group of chemical elements whose physical and chemical characteristics vary progressively from one end of the series to another. ... A periodic table group is a vertical column in the periodic table of the chemical elements. ... In the periodic table of the elements, a period is a row of the table. ... A block of the periodic table of elements is a set of adjacent groups. ... A period 8 element is one of the chemical elements in the eighth row (or period) of the periodic table of the elements. ... The g-block of the periodic table of the elements consists of those elements for which, in the atomic ground state, the highest-energy electrons occupy g-orbitals. ... Color is an important part of the visual arts. ... Wikipedia does not yet have an article with this exact name. ... The atomic mass of a chemical element (also known as the relative atomic mass or average atomic mass or atomic weight) is the average atomic mass of all the chemical elements isotopes as found in a particular environment, weighted by isotopic abundance. ... AMU redirects here, but may also refer to the Arab Maghreb Union The unified atomic mass unit (u), or dalton (Da), is a small unit of mass used to express atomic masses and molecular masses. ... óéàThe discussion below presumes knowledge of material contained at Atomic orbital. ... General Name, Symbol, Number ununoctium, Uuo, 118 Chemical series noble gases Group, Period, Block 18, 7, p Appearance unknown, probably colorless Atomic mass (293) 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 presumably... 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. ... Electron configuration is the arrangement of electrons in an atom, molecule or other body. ... Properties The electron is a fundamental subatomic particle which carries a negative electric charge. ... A quantum mechanical system can only be in certain states, so that only certain energy levels are possible. ... 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. ... Silly Fact: The Word Isotpe is used the the Early Adult Cartoon - The Simpsons. ... 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. ... In physics, the decay mode describes a particular way a particle decays. ... The decay energy is the energy released by a nuclear decay. ... An electronvolt (symbol: eV) is the amount of energy gained by a single unbound electron when it falls through an electrostatic potential difference of one volt. ... 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. ... A chemical element, often called simply element, is a chemical substance that cannot be divided or changed into other chemical substances by any ordinary chemical technique. ... The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev. ...

History

The name unbiunium is used as a placeholder, such as in scientific articles about the search for element 121. Transuranic elements beyond plutonium are always artificially produced, and usually end up being named for a scientist or the location of a laboratory that does work in atomic physics. 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. ...

The element is of interest because it is the first element whose lowest energy electron (electron) lies in a type G orbital, which may hold up to 18 electrons. Other elements have access to their g-electron shells, though not in their 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. ...

See systematic element name. In chemistry, heavy transuranic elements receive a permanent name and symbol only after their discovery has been confirmed. ...

External links

• WebElements.com - Unbiunium
• Likely properties of Unbiunium
• Transition energies of lanthanum, actinium, and eka-actinium (element 121)
• Journal of Chemical Physics, 1998, V 109, N 10, 8 Sep.

See also

• Actinium