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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
June 15, 2024
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23 Jan 1817 Jahr - 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.

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Datum:

23 Jan 1817 Jahr
Jetzt
~ 207 years ago