Early Postulates

Early Postulates

Bohr,s Model

So Little From So Much

• Marie Curie purified 10,000,000 grams of Pitchblende to get 0.1 Grams of Uranium

• Natural uranium is

• 99. 3% U238

• 0. 7% U235 (The Bomb Type)

Problem – Not Enough 235U How to increase the Concentration?

How Big was the Job?

So Much from So Little

The End

Just saving it