Unbiunium

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121 Ubn ← unbiunium → Ubb ↑ Ubu ↓ Usu periodic table - Extended 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
Selected isotopes
Main article: Isotopes of unbiunium iso NA half-life DM DE (MeV) DP
References

Unbiunium (IPA: /ˌʌnbiˈjuːniəm/) 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.

Unbiunium is the first element whose ground state electron configuration contains an electron in a g subshell, making it the first element in the g-block. Other elements have access to their g subshells, though not in their ground states.

[edit] History

The name unbiunium is used as a placeholder, as in scientific articles about the search for element 121. Transuranic elements (those beyond uranium) are, except for microscopic quantities, 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).

[edit] External links

• WebElements.com - Unbiunium
• Likely properties of Unbiunium
• Journal of Chemical Physics, 1998, V 109, N 10, 8 Sep.

[edit] See also