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Ununhexium Facts

Chemical & Physical Properties

By Anne Marie Helmenstine, Ph.D., About.com

Ununhexium is a radioactive man-made element.

Ununhexium is a radioactive man-made element.

Architetto Francesco Rollandin, openclipart.org
Periodic Table of the Elements

Ununhexium (eka-polonium)

Symbol: Uuh

Atomic Number: 116

Element Classification: Metal

Phase: probably solid

Discovery: In December, 2000 the Joint Institute for Nuclear Research (Dubna, Russia) described the discovery earlier in 2000 of the decay of the isotope Uuh-292, which was produced in the reaction of Cm-248 with Ca-48. Uuh-292 has a half-life of ~18 milliseconds and decayed into Uuq-288.

Electronic Configuration: [Rn] 5f14 6d10 7s2 7p4 (based on polonium)

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