P1.1 - The Particle Model Flashcards
1
Q
What was Dalton’s model?
A
Very small indestructible spheres
All the atoms in an element are the same
The atoms in one element are different from the atoms in all other elements
2
Q
What was JJ Thomson’s model?
A
An atom was a positive mass with negative electrons embedded throughout
Had a neutral overall charge
3
Q
What was Rutherford’s model?
A
Most of the atom is empty space
A small positively charged nucleus with protons and neutrons
Nucleus made up most of the weight
Electrons circled the nucleus like planets
4
Q
What was Bohr’s model?
A
Nucleus is the same as Rutherford’s model
Electrons could only move in fixed orbits, called electrons shells
5
Q
What is the diameter of an atom (standard form)?
A
1x10 -10 m
