How did we know the atomic masses? | Periodic table history|

- introduction 00:00
- Elements 02:04
- why we classified Elements 02:38
- Lavoisier classification 03:05
- conservation of mass law 04:26
- law of definite proportions 05:05
- law of multiple proportions and atom discovery 05:36
- Dalton weighs the elements 07:32
- Prout's Hypothesis 09:36
- Avogadro's Law 10:23
- Doberiener's Classification 12:53
- Cannizzaro weighs the elements 13:41
- Dechancoutois Periodic Table 15:32
- John Newlands periodic table 16:32
- Mendeleev's periodic table 19:13
- Limitations of Mendeleev's periodic table 21:40
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