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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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31 ene 1895 año - Wilhelm Roentgen discovered x-rays, formerly known as Roentgen rays, while experimenting with cathode rays.
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1st Nine Weeks Honor Project Chemistry
By
Ayanna
18 oct 2018
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fecha:
31 ene 1895 año
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~ 130 years ago
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