Exactly <span>1,538,022 people in America were slaves in 1820.</span>
Individually they wanted ad need a lot of money. As a group that need a huge voice. A group that can boycott, picket and create a unwanted attention to opposing views. Or the positive attention to their cause.
Here are some of their achievements:
- theory of radioactivity
-discovery of a new element, polonium
-discovery of another element, radium
- developing new ways of separating radioactive isotopes
-discovery of nuclear energy ( by Pierre and one of his students)
