21acrocker
21acrocker
23-10-2017
Chemistry
contestada
what were the first 16 elements known in 1760
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breslowa21
breslowa21
23-10-2017
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminum
Silicon
Phosphorus and
Sulfur
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