William Ramsey suggest placing argon in separate group between chlorine and potassium (7 h 22 m, 1 jan 1898 ano – 9 h 12 m, 31 dez 1898 ano)
Descrição:
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.
Adicionado na linha do tempo:
Data:
7 h 22 m, 1 jan 1898 ano
9 h 12 m, 31 dez 1898 ano
~ 12 months
Imagens: