1
Q
Dalton’s model
A
Atoms are solid phered
Different spheres make up different elements
1
Q
Order of models
A
Dalton’s
Thomson’s
Rutherford’s
Bohr’s
2
Q
Thomson’s model
A
Plum pudding model
Positively charged cloud with small negatively charged particles inside (electrons)
3
Q
Rutherford’s model
A
Fired alpha particles at gold sheet
Most alpha particles (+ charged) passed through gold atoms
Has positive nucleus and electrons around
4
Q
Bohr’s model
A
E- exist in fixed orbits not between them
Each shell has fixed energy
when e- moves between shells electromagnetic radiation is emitted or absorbed, because energy of shells are fixed, radiation has fixed frequency
