History of the Atom Test Review

Greek philosopher that said all matter is made of tiny particles called atoms

• Plato

• Aristotle

• Democritus

• Socrates

any substance that cannot be broken down into simpler substances

Ratios of elements in substances always remains the same. Ex - two times more H than O when breaking down water into elements.

• The discovery made in 1911

• The discovery made in 1794

• The discovery made in 1897

• The discovery made in 1932

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negatively charged subatomic particles

• Neutron

• Proton

• Negatron

• Electron

J.J Thomsons' model of an atom, in which he thought electrons (the plums) were randomly spread out within a positively charged region (the pudding)

• Plum Pudding Model

• Nuclear Model

• Particle Model

• Electron Cloud Model

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Overall charge of an atom, number of negative charges are balanced out by the same number of positive charges.

Rutherford's model of the atom,small positively charged nucleus issurrounded by electrons.

• Particle Model

• Plum Pudding Model

• Nuclear Model

• Bohr Model

Almost all alpha particles passed through empty space of gold atoms. 1/10,000 interacted with nucleus and bounced back.

• Cathode Ray Tube Experiment

• Light Emission Experiment

• Thought Experiment

• Gold Foil Experiment

Charge of the Nucleus

• Neutral

• Positive

• Negative

• All the charges together

The interaction that takes place between two positive particles.

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