Atomic Theory Flashcards
He is a Greek philosopher and also known father of modern atomic thought
Democritus
He even said that matter could not be divided into smaller pieces
Democritus
It is indivisible, particles that make up all matter
Atomos
Spaces where atomos can freely move and collide
Void
He told that matter is made up of different amount of elements (Earth, Fire, Air, and Wind)
Aristotle
He proposed the first atomic theory and that atom is a solid sphere or billiard ball
John Dalton
It is called ______ with same elements but with different masses.
Isotopes
He discovered electrons
J J Thomson
Proposed the Raisin Bun/Plum pudding model
J J Thomson
He discovered the atoms are made up of even smaller particles called subatomic particles. Proposing the existence of positively charged particles.
J J Thomson
He proposed Cathode Ray Tube Experiment(electricity enters cathode (negative charge; anode = positive) to produce beam)
J J Thomson
He discovered protons and the nucleus
Ernest Rutherford
He proposed the gold foil experiment(beam did not hit the center/deflected to the other direction instead of going in a straight way)
Ernest Rutherford
Proposed the planetary model
Niels Bohr
Improved Rutherford’s Model
Niels Bohr
