P1.1 Particle Model Flashcards
What was Dalton’s mode?
His model of the atom was a very small indestructible sphere. He suggested that all atoms in an element were the same and the atoms in one element are different from the atoms of all other elements
What was Thomson’s model?
Thomson discovered the electron. Therefore he knew atoms contained negative electrons and were neutral. 1904, Thomson suggested the plum pudding model where the atom was a positive mass withe electrons embedded in it
What was the Rutherford model?
Rutherford suggested an atom is made of a positively charged nucleus with electrons outside. This was concluded from his experiment firing alpha particles at a single atom thick gold foil
What was the Bohr model?
Bohr suggested electrons can only move in fixed orbits called electron shells. The Bohr model has been improved on in later years
How large is a single atom?
10^-10
