History of the Atom (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Scientist who first published atomic theory in 1803
Scientist who first published atomic theory in 1803
John Dalton
Dalton's description of atoms
Dalton's description of atoms
Indivisible and indestructible spheres
Scientist who discovered the electron (1897)
Scientist who discovered the electron (1897)
J.J. Thomson
Thomson's atomic model name
Thomson's atomic model name
Plum pudding model
Description of plum pudding model
Description of plum pudding model
Ball of positive charge with electrons scattered throughout
Scientist who did gold foil experiment (1909)
Scientist who did gold foil experiment (1909)
Ernest Rutherford
Particles used in Rutherford's gold foil experiment
Particles used in Rutherford's gold foil experiment
Positively charged alpha particles
What happened to most alpha particles in gold foil experiment?
What happened to most alpha particles in gold foil experiment?
Passed straight through the foil
What did alpha particles passing through show?
What did alpha particles passing through show?
Atoms are mostly empty space
What happened to some alpha particles?
What happened to some alpha particles?
Deflected in various directions
What did deflection show about the atom?
What did deflection show about the atom?
Small, dense, positively charged region at centre
Rutherford's atomic model name
Rutherford's atomic model name
Nuclear model
Central region in Rutherford's nuclear model
Central region in Rutherford's nuclear model
Nucleus
Charge of the nucleus
Charge of the nucleus
Positively charged
What the nucleus contains
What the nucleus contains
Most of the atom's mass