1. 

   SaGo Moderator

   Shortcut trick to memorize the names of the invention.
   
   RTC - PEN
   
   Rutherford - Protons
   Thompson - Electron
   Chadwick - Neutrons.

    

   SaGo, Jun 13, 2018

   #1

• Log in with Twitter
• Log in with Google

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in