33
/it/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
5636944
532222
2

1 gen 1864 anni - John Newlands (1864) Proposed classifying the elements in order of increasing atomic weights and were grouped similarly to today's 7 groups (e.g Alkali Metals, Metalloids, ect.)

Aggiunto al nastro di tempo:

30 lug 2021
2
0
268

Data:

1 gen 1864 anni
Adesso
~ 161 years ago