Dictionary.com

element 117

Save This Word!

Uus
An artificially produced radioactive element whose most stable confirmed isotopes have mass numbers of 293 and 294, with the lighter, more stable isotope having a half-life of less than 80 milliseconds. Also called ununseptium See Periodic Table.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

How to use element 117 in a sentence

FEEDBACK