Name of
scientist
When/where
Democtritus
Ancient Greek,
400BC
Description of model
John Dalton English
Joseph Thomson
‘plum-pudding model’.
Atom was a solid atoms contained negatively charged particles called
electrons
He suggested that atoms were ball of positively-charged spheres with
electrons embedded within it
Ernest Rutherford
Niels Bohr
Danish, 1913
James Chadwick
English, 1932
Diagram of
model