history of atoms Flashcards
What term did Democritus coin?
Atomos
Democritus belief
Atoms are the basic form of matter; small ball that is indestructible and indivisible
Aristotle’s theory
Matter is made out of earth, fire, wind, water
Dalton’s model
Spherical ball model
Dalton’s belief
Atoms are indivisible and indestructible; same elements have the same atoms
Thomson’s model
Plum pudding model
Thomson’s Discovery
Sub-atomic particles (electrons)
Robert Millikan’s discovery
With the oil drop experiment, he was able to find the charge and mass of electrons
Rutherfords’ model
nuclear model
Rutherford’s discovery
Protons
Rutherford’s statement
electrons are moving and discovered it by the gold foil experiment
Bohr’s model
Planetary model
Bohr’s discovery
Orbitals; protons are in the middle and electrons orbit around it
Chadwick’s discovery
Neutron
Schrodinger’s model
Quantum model
