William Ramsey suggest placing argon in separate group between chlorine and potassium (7 h 22 min, 1 janv. 1898 ans – 9 h 12 min, 31 déc. 1898 ans)
Description:
Chemically inert- did not fit with other elements on the table because had no leftover valence electrons.
Ramsey correctly predicted discovery of Neon, and it's properties.
Ajouté au bande de temps:
Date:
7 h 22 min, 1 janv. 1898 ans
9 h 12 min, 31 déc. 1898 ans
~ 12 months
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