33
/fr/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 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
Close
Create a timeline
Public timelines
FAQ
About & Feedback
Un accord
Confidentialité
FAQ
Support 24/7
Cabinet
Get premium
Donate
Télécharger
Export
Créer une copie
Premium
Intégrer dans le site Web
Share
The Historical Development of the Period Table
Category:
Autre
mise à jour avec succès:
20 janv. 2020
0
0
325
Auteurs
Created by
Joshua Martin
Attachments
Comments
The Main Events of World War 1
By
Joshua Martin
2 nov. 2020
0
0
255
Les événements
47 elements were discovered
John Newlands divided the new 53 elements into 11 groups.
Dimitri Mendeleev started the development of the periodic table.
Sir William Ramsay and Lord Rayleigh discovered noble gases.
J.J. Thomson discovered electrons.
Lord Rutherford announces that radioactivity is caused by the breakdown of an atom.
Rutherford discovered electrons orbit the nucleus.
Rutherford found protons in the nucleus. Rutherford turned a nitrogen atom to an oxygen atom for the first time. Henry Moseley gave us atomic numbers.
James Chadwick discovered neutrons.
About & Feedback
Un accord
Confidentialité
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