Evolution of atomic theory Flashcards
What are the key features of the atom that was described by Democritus and then John Daltoon
Uniform, solid, hard, incompressible and indestructible
Dalton : A small, solid, indivisible sphere made up of a particular element
What are the features of the plum pudding model of an atom
One big proton surronded by smaller negativly charged electrons.
Can you describe the nuclear atom
Neutrons and protons are inside the nucleus and electrons are on the outer rings
Important conclusions from the cathode ray experiment and gold foil experiment
Cathode ray : Cathode rays were composed of negatively charged particles
Gold foil : nucleus is positively charged and is very heavy compared to electrons
What was Lavoisiers key contributions to the understanding of atomic theory
Matter of mass is conserved in chemical reasons
