33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 1, 2025
Create a timeline
Public Timelines
For education
For educational institutions
For teachers
For students
Cabinet
For educational institutions
For teachers
For students
Open cabinet
FAQ
Get premium
Close
Create a timeline
Public timelines
FAQ
About & Feedback
Terms
Privacy
FAQ
Support 24/7
Cabinet
Get premium
Donate
Edit
Download
Export
Duplicate
Premium
Embed
Share
chemistry
Category:
Other
Updated:
19 Sep 2017
0
0
541
Contributors
Created by
D'Kerrington Traylor
Attachments
Comments
Events
400BC Democritus Matter is made of small particles
1777 Antoine Lavoisier Mass is conserved in a chemical reaction
1803 John Dalton All matter is composed of atoms
1897 J.J. Thomson Discovered electrons
1909 Ernest Rutherford Discovered Protons in nucleus
1913 Niels Bohr Electrons had different energy levels
1926 Erwin Schrodinger Electron cloud model
1932 James Chadwick Discovered neutrons
About & Feedback
Terms
Privacy
FAQ
Support 24/7
Cabinet
Get premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
Comments