History and Subatomic Particles Flashcards
Who is Democritus?
he discovered that everything was made out of atoms. He also said that these atoms were indivisible and indestructible.
Who is JJ Thompson?
He discovered that atoms contain subatomic particles
Who is Earnest Rutherford?
He founded the nucleus
Who is Niels Bhor?
He discovered how electrons can ‘jump’ from energy level to energy level and it happens because you see light
Who is James Chadwick?
He designed an experiment to show that neutrons existed
What experiment did Robert Milken use?
He used the Oil Drop Experiment
What is the Heisenberg Uncertainty Principle?
You can never know the velocity and position of an electron, if you start to know one, the other will elude you
What are atoms mostly made up of, and how do you know?
Empty Space, most of the alpha particles in the Gold Foil Experiment went straight through
