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13 cards from this deck
Tiny, solid spheres that cannot be split
Indivisible - cannot be cut into smaller parts
Positive sphere with electrons stuck inside
Electrons (tiny negative particles)
Most particles went straight through atoms
Atoms are mostly empty space
Tiny, positive central core called nucleus
Orbit nucleus at specific/fixed distances
Positive particles in the nucleus
Neutral particles (no charge) in nucleus
James Chadwick
Explained why atoms heavier than expected from protons/electrons
When new experimental evidence is discovered
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