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J.J Tomson
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Opposite attract
Like charges repel
Provided Evidence for spasmodic particles
Rutherford
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Gold-foil
Atoms positive (protons) Charges are located
in nucleus
Sections 4.1 Assessment
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1.Atoms that cannot be divided
2.The first evidence that atoms are made up of smaller particles
3.That all of the atoms charge are concentrated individually
5.He assumed the atoms were invisible
Notes 4.2
Definitions
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Protons - p+, positive charge 1+, located inside the nucleus
Neutrons- n, no charge 0, located inside the nucleus
Electrons- e-, negative charge 1-, located outside the nucleus
*Electrons are smaller than protons and neutrons*
*Protons and Neutrons are about the same size*
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