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23 jan 1817 ano - In 1817 Johann Dobereiner noticed that the atomic weight of strontium fell midway between the weights of calcium and barium, elements possessing similar chemical properties.

Adicionado na linha do tempo:

Brenna Fleming: timeline

ByBrenna Fleming
8 dez 2017

Data:

23 jan 1817 ano
Agora
~ 207 years ago
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