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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

Les images: