Atom History Flashcards
Who invented the plum pudding model and when ?
JJ Thomson 1897
What is the plum pudding model
A ball of positive charge with negative electrons embedded
Who in the 1800’s suggested that atoms when tiny spheres
John Dalton
Who invented the nuclear model and when
Rutherford and Marsden 1911
What is the nuclear model
Suggested that the mass and positive charge of the atom was concentrated in a small space in the centre (the nucleus)
What was the experiment that lead to the discovery of the nuclear model
When they fired alpha particles at a thin sheet of gold foil 1 in 10000 bounced back suggesting the nucleus
Who invented the electron model and when
Niels Bohr 1913
What is the electron model
Electrons orbit the nucleus at specific distances and are found in specific levels
Who invented the neutron
James Chadwick 1932
Who invented the proton
Rutherford
Who invented the electron
Niels Bohr
