models of the atom Flashcards
(10 cards)
who created the atomic mode and when?
John Dalton 1808
what did John Dalton find out?
atoms can’t be created divided or destroyed
who created the plum pudding model and when?
Joseph J Thompson 1904
what did JJ Thompson find out?
an atom is a sphere of positive charge with negatively charged atoms around it
who created the Rutherford model and when?
Ernest Rutherford 1911
what did Ernest Rutherford find out?
most of the mass is concentrated in the centre. the positively charged core is called a nucleus
who created the Bohr model and when?
Nielhs Bohr 1913
what did Nielhs Bohr find out?
electrons are organised in shells
who created Chadwick model and when?
(doesn’t actually have a name)
James Chadwick 1932
what did Chadwick find out?
discovered neutrons that updated the model we still use today
