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atomic number 1

n.
1.a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas

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    Idiom of the Day

    call out to (someone)
    to shout to someone
    We called out to our friend at the concert but she did not hear us.



    1.
    If someone tells you that they were not born yesterday, they mean that they are very old.

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    Invention
    Invention : eyeglasses
    Year : 1280s
    Inventor : salvino degli armati or alessandro di spina
    Country : italy.      .. More >>
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