| Symbol |
Name |
Atomic
Number |
Atomic
Weight |
Group
Number |
| Uuo |
Ununoctium |
118 |
293 |
18 |
Description
Standard State: Presumably a solid at 298 K
Color: Unknown, but probably metallic and silvery white or gray in appearance
Three atoms of element 118 (ununoctium, Uuo) were synthesized by fusing krypton-86
with lead-208 in experiments conducted at at The Lawrence Berkeley National Laboratory,
Berkeley, The University of California, and Oregon State University, Corvallis. It is very
short-lived and decomposes to element 116.
Elements 118 and 116 were identified by accelerating a beam of krypton-86 ions to an
energy of 449 million electron volts and directing the beam onto targets of lead-208.
After 11 days work, just three atoms of the new element were identified. The production
rates for element 118 are approximately one in every 1012 interactions. |