Changes in the Atomic Model (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Year electrons were discovered
Year electrons were discovered
1897
What the plum-pudding model proposed
What the plum-pudding model proposed
Ball of positive charge with negative electrons embedded
Material used as foil in alpha-scattering experiment
Material used as foil in alpha-scattering experiment
Gold
Charge of alpha particles
Charge of alpha particles
Positive
Main observation in alpha-scattering experiment
Main observation in alpha-scattering experiment
Most alpha particles passed straight through
What alpha-scattering showed about atoms
What alpha-scattering showed about atoms
Atoms are mainly empty space
What the nucleus contains
What the nucleus contains
Great deal of mass and positive charge
Model that replaced the plum-pudding model
Model that replaced the plum-pudding model
Nuclear model
Bohr's idea about electron movement
Bohr's idea about electron movement
Electrons orbit nucleus at specific distances
Terms for electron orbits
Terms for electron orbits
Energy levels or shells
Scientist who discovered neutrons
Scientist who discovered neutrons
James Chadwick
Radius of an atom
Radius of an atom
or
Radius of the nucleus
Radius of the nucleus
Why atoms have no overall charge
Why atoms have no overall charge
Number of electrons equals number of protons
Relative mass of proton and neutron
Relative mass of proton and neutron
1