Lesson 2 (DEVELOPMENT OF ATOM) Flashcards
(19 cards)
He said that water as the ultimate substance that constituted matter (flat earther)
Thales of miletus
He considered air, water, earth and fire as the four essential elements that are sources of all kind of matter
Empedocles of agrigentum
First atomist but less well known than his partner
Leucippus
Expanded his partners hypothesis
Dubbed as father of atomism
Thought atoms were solid and indestructible
Democritus
Philosophy where they believe matter is produced from atom
Atomism
According to Democritus
Atoms and void exist in reality
Atoms have different shape, sizes and masses depending on substance they formed
When there is no atom, there is void
Assumed that only observable things can be proven true
Aristotle
He belived that water, air, fire and earth were the fundamental element, while hot, cold, det and wet are properties that combined to produced fundamental element
- aether another fundamental element
Aristotle
Said that water, fire, earth and air are not true elements
Corpuscles
Belived that atoms indeed exist w/o the sight of naked eye
Robert Boyle
British chemist, computed relative masses, introduced table of elements, published the teue atomic theory
John dalton
Theory where All matter is made up of atoms, indestructible and individual particles
Atomic theory
Conducted experiments that supported idea of presence of atom
Father of law of conservation
Antoine-laurent Lavoisier
Matter is neither created nor destroying by chemical reactions or physical changes
Law of conservation of mass
Used copper carbonate as reactant in a decomposition reaction
Joseph-louis proust
Discovered electrons
Joseph john thomson
Used to discover electron by using vacuum tube with 2 metal electrode
Cathode ray tube experiment
Suggested that atoms was like plum pudding, atoms consist of electron (plums) embedded inside a sphere (pudding)
Plum pudding
Said that Thomson’s model was incorrect and performed gold foil method
Ernest Rutherford
