Early Atomic Theory

JJ Thomson was credited for the discovery of the:

• Center of the universe

• Proton

• Electron

• Neutron

The first universally accepted theory on atoms was proposed in 1803 by:

• Winston Churchill

• John Dalton

• James Bond

• J J Thomson

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

What contribution did John Dalton make to atomic theory? 

• He discovered that every atom was positively charged.

• He discovered that every element consisted of one type of atom 

• He discovered that atoms had nuclei 

• He discovered that atoms could be divided into smaller parts

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Niels Bohr suggested that electrons:

• Are found in specific energy levels

• Are scattered throughout the atom

• Move according to their energy level

• Are positive

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Rutherford discovered this part of the atom:

• Nucleus

• Neutron

• Proton

• Electron

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Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

• Atoms are made up of mostly empty space.

• Atoms are mainly solid and block alpha particles.

• The volume of the nucleus is large compared to the rest of the atom.

• The mass of the nucleus is small compared to the rest of the atom.

What did Ernest Rutherford’s gold foil experiment demonstrate about atoms?

• Their positive charge is located in a small region that is called the nucleus.

• Their negative charge is located in small particles that are called electrons.

• Their nucleus makes up the majority of the volume of the atom.

• Their electrons are floating in a sea of positive charges.

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What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?

• Ernest Rutherford, JJ Thomson, John Dalton, & Democritus

• JJ Thomson, John Dalton, Ernest Rutherford, & Democritus

• Democritus, John Dalton, JJ Thomson, Ernest Rutherford.

• John Dalton, JJ Thomson, Democritus, & Ernest Rutherford

Which one of these is Dalton's Model?

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