1 Jan 1900 Jahr - Fredrick Soddy-Isotopes

Beschreibung:

-Came up with the term "isotopes" or or new elements that explain the unintentional breakdown of radioactive elements.
-different elements can be chemically not distinguishable but have different atomic weights and characteristics
-discovered "half-life"
-made original calculations on energy released during the process of decayy.

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