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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 ene 1898 año - Argon was placed in a new group called Noble Gases.
Añadido al timeline:
Periodic Table Timeline
By
Jessica Maeda
16 dic 2017
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fecha:
1 ene 1898 año
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~ 127 years ago
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