History Of An Atom Flashcards
The way an atom was created, early models of atoms and the way they have evolved
What did Dalton discover
That matter is made up of atoms which are indivisable and indestructable
What did JJ Thompson discover
Plum pudding model, a model which showed that electrons where held in a positive cloud
How did Rutherford’s discovery change the plum pudding model
Rutherford conducted the alpha particle experiment which consisted of him shooting a ray of positively charged alpha particles at a thin sheet of gold.As he did this he realised most of the particles had shot straight through yet some had deflected.After this he came to the conclusion that the atom was mostly made up of empty space and had a concentrated part of it which was positively charged which he called the “Nucleus”
What did Bohr discover
Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element
