Sir William Ramasay Period (28 dez 1894 ano – 8 mar 1898 ano)
Descrição:
This is when Sir William Ramsay was reaserching the atomic elements known as the noble gases which is now a new family of elements.
Adicionado na linha do tempo:
Data:
28 dez 1894 ano
8 mar 1898 ano
~ 3 years and 2 months
Imagens:
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