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.
GEE WHILLIKERS! WAIT TILL YOU SEE THIS WORD OF THE DAY QUIZ!
Do you remember all the words from last week, September 21–27, 2020? Then this quiz should be butyraceous.
Question 1 of 7
What does “yare” mean?
Words nearby element 117
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.