Atomic Models Flashcards
(5 cards)
What are the main points of Dalton’s Atomic Theory?
All matter is made of atoms, atones of the same element are identical, compounds are combinations of different atoms, reactions rearrange atoms
What was Thomson’s contribution to atomic theory?
Discovered the electron, proposed the “plum pudding model” where electrons are embedded in a positively charged sphere
What did Rutherford’s gold foil experiment reveal?
Atoms have a dense, positively charged nucleus and are mostly empty space
Describe Bohr’s atomic model
Electrons orbit in fixed shells; can jump levels by absorbing or releasing energy
What is the Quantum Mechanical Model of the atom?
Electrons exist in orbitals; described by probability clouds based on on Shrodinger’s equation