Discovery of the atom (Edexcel GCSE Physics Combined Science): Flashcards
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14 cards from this deck
Greek model of atom
Greek model of atom
Tiny spheres that cannot be divided
Thomson's Plum Pudding Model
Thomson's Plum Pudding Model
Ball of positive charge with negative electrons embedded
Year of Rutherford's alpha scattering experiment
Year of Rutherford's alpha scattering experiment
1909
Particles fired at gold foil (Rutherford)
Particles fired at gold foil (Rutherford)
Alpha particles (positively charged)
Most alpha particles went straight through - why?
Most alpha particles went straight through - why?
Atom is mostly empty space
Some alpha particles deflected - why?
Some alpha particles deflected - why?
Centre has positive charge, repelling them
Some alpha particles bounced back - why?
Some alpha particles bounced back - why?
Mass is concentrated in the centre
Bohr's model - where electrons are located
Bohr's model - where electrons are located
Orbit nucleus at specific distances
Bohr's name for electron orbits
Bohr's name for electron orbits
Energy levels or shells
Current model - what nucleus contains
Current model - what nucleus contains
Protons and neutrons
James Chadwick's discovery
James Chadwick's discovery
Neutron
Year of Dalton's atomic theory
Year of Dalton's atomic theory
1803
Year J.J. Thomson proposed plum pudding model
Year J.J. Thomson proposed plum pudding model
1897
Year of Rutherford's atomic model
Year of Rutherford's atomic model
1911