ununbium

colspan="2" align=center bgcolor="#ffc0c0"\|Known properties
colspan=2 align=center\|roentgenium – ununbium – ununtrium
rowspan=3 valign=center\|Hg Uub
align=center\| Full table	}
a href="/encyclopedia/List-of-elements-by-name" title="List of elements by name">Name, Symbol, Number	Ununbium, Uub, 112
a href="/encyclopedia/Chemical-series" title="Chemical series">Chemical series	Transition metal
a href="/encyclopedia/periodic-table-group" title="periodic table group">Group, Period, Block	12, 7, d
a href="/encyclopedia/color" title="color">Appearance	Unknown, probably a metallic and silvery white or grey colour.
a href="/encyclopedia/Atomic-weight" title="Atomic weight">Atomic weight	[277] amu
a href="/encyclopedia/Electron-configuration" title="Electron configuration">Electron configuration	[Rn].5f¹⁴ 6d¹⁰ 7s² a guess based on Mercury
a href="/encyclopedia/electron" title="electron">e^-s per energy level	2, 8, 18, 32, 32, 18, 2
a href="/encyclopedia/State-of-matter" title="State of matter">State of matter	probably liquid

Ununbium (eka-mercury) is a chemical element in the periodic table that has symbol Uub and has the atomic number 112. Element 112 is one of the superheavy elements and its atoms decompose through the emission of alpha particles with a half life of only about 240 µs. Some research has referred to it as "eka-mercury".

History

It was first created on February 9, 1996 at the Gesellschaft fr Schwerionenforschung (GSI) in Darmstadt, Germany. This element was created by fusing a zinc atom with a lead atom by accelerating zinc nuclei into a lead target in a heavy ion accelerator. Ununbium is a temporary IUPAC systematic element name.

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