Forgot your password?

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Home
Library
Discoveries > Science
Gunpowder
Electrical currents
The Milky Way
Smallpox vaccine
The dual nature of light
Earth's revolution...
Penicillin
Stainless steel
Archimedes’s Screw
Quinine
The structure of matter
The circulation of blood
The existence of...
The Pythagorean Theorem
Dua
Activities
Uncle Shine
Magazine
Did you know?
Games
Latest News
 

Discoveries

 
   

 

 

 
Bookmark and Share

Next   Back
 

The structure of matter

 
   
 
In 1789, French chemist Antoine Lavoisier published a list of "elements"--substances that he said could not be broken down further by any chemical process. His list was incomplete and contained mistakes, but he was onto something. Building on his work, chemists developed our modern view that all matter can be broken down into just 109 elements, that all elements are made of atoms, and that all atoms are made of just three types of particles -- protons, neutrons, and electrons.

 
Next   Back

Bookmark and Share
 
 
Close