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element 117

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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.
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ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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