41
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
May 31, 2026
2222709
186409
2
Create a timeline
Public Timelines
For companies For educational institutions For teachers For students Dashboard
For educational institutions For teachers For students Dashboard
FAQ
Create a timeline
Public timelines
FAQ
About & FeedbackTermsPrivacyFAQ
Support 24/7  
DashboardGet premium
Donate

18h 15min, nov 2, 1817 y - Döbereiner's Triads

Description:

Döbereiner, German Scientist makes law of Triads.
He arranges elements in groups of three according to appearance and chemical properties.
Scientists started to discover the atomic masses of elements and Döbereiner realised that the middle one of his three atoms would have an atomic mass equal to the average of the other two.

Added to timeline:

Development of Periodic Table

ByKarl Stücker
26 Nov 2018
0
0
432

Date:

18h 15min, nov 2, 1817 y
Now
~ 208 years ago
About & FeedbackTermsPrivacyFAQ
Support 24/7  
DashboardGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL