atomic theory guys

Democritus: the basics the year analogy

400 b.c.

Basics: atoms are uncuttable made of the same thing

model = ball analogy = lego

Aristotle: the basics the year analogy

300 b.c to early 1800s Basics: matter is made up of 4 elements fire air water earth

model = element table analogy = death of chemesrty for 2000 years

dalton: basics year analogy

1803 Basics: re introduced the idea of atoms and all atoms of a given element are exactly the same and different elements are made of different atoms 

model = ball analogy = billiard ball

thomson : basics year analogy

1897 Basics: discovered the electron and plum pudding model

model = electrons in positive circle analogy = plum pudding

rutherford: basics year analogy

1908 Basics: discovered nucleus and atoms are mostly space 

model =ovals around nucleus analogy = cherry with pit

bohr year basics analogy

1913 basics : most of an atom's mass is in the nucleus , energy levels 

model =energy levels analogy = solar system

modern cloud basics year analogy

20th century Basics: electrons are in clouds and whirl around the nucleus 

model = big cloud analogy = cotton ball