Topic 10 - atom models over time Flashcards
1
Q
what did john dalton describe atoms as
A
solid sphere made up of different elements
2
Q
what was the plum pudding model
JJ tomphson
A
atoms contained negatively charged electrons
3
Q
golden foil experiment
rutherford
A
positive alpha particles fired through thin sheet of gold
expecting to go straight through or deflect
they did both but also went backwards
this meant the plum pudding model was wrong
4
Q
what was rutherfords theory of the nulear atom
A
positive charged nucleus surrounded by electrons
5
Q
what was the bohr model
A
electrons can only exist in fixed orbits
each shell has a fixed energy
