Simplified Particle Theories.

Question 1

Dalton’s Model:

Answer 1

Simple/indestructible spheres where atoms are the same.

Question 2

Thomson’s Model.

Answer 2

Plum-pudding model of the atom= positive mass w/ electrons embedded in it. Didn’t know so THOUGHT that the positive mass was solid/cloud.

Question 3

Bohr’s Model.

Answer 3

Electrons can only move in fixed orbits- electron shells- around the nucleus. Still provides a good basis for imagining how protons/neutrons/electrons in atoms are arranged.

Question 4

Rutherford’s Model.

Answer 4

Atom= tiny, positively charged nucleus with electrons around the outside. Almost all the mass of an atom is in its nucleus.

Question 5

Democritus and Leucippus.

Answer 5

Simple/indestructible sphere.