33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 2025
451156
38777
2
Create a timeline
Public Timelines
For educational institutions For teachers For students Cabinet
For educational institutions For teachers For students Open cabinet
FAQ
Create a timeline
Public timelines
FAQ
About & FeedbackTermsPrivacyFAQ
Support 24/7  
CabinetGet premium
Donate

jan 1, 1817 - Johann Dobereiner noticed that elements of similar chemical properties are grouped together based on atomic weight.

Added to timeline:

Periodic Table Timeline

ByJessica Maeda
16 Dec 2017
0
0
593

Date:

jan 1, 1817
Now
~ 208 years ago
About & FeedbackTermsPrivacyFAQ
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL