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atomic number 10

n.
1.a colorless odorless gaseous element that give a red glow in a vacuum tube

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  • Idiom of the Day

    stand on ceremony
    to be formal
    "You do not need to stand on ceremony. You can relax."



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    Pick the correct Antonym:
    Heinous

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    In the 17th century, the number pi was known to 35 decimal places. Today, to 1.2411 trillion.      .. More >>
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