Atomic Theory and Isotope Review

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 that couldn't be divided. 
• He discovered that atoms had nuclei. 
• He discovered that atoms could be divided into smaller parts. 

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Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

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Who came up with the model of an atom pictured?

• J.J. Thomson

• Ernest Rutherford

• Neils Bohr

• James Chadwick

The first person to propose a theory about an atom called the Atomos Theory was

• Democritus
• Rutherford
• Dalton
• Aristotle

How did Thomson build upon Dalton's model?

• His model was the same.

• He put electrons in orbitals.

• He discovered the nucleus.

• He discovered subatomic particles (electron).

Who's model is this? 

• Millikan
• Rutherford
• Thomson
• Bohr

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NGSS.MS-PS1-1

How did each model of the atom help to develop the atomic theory? 

• Each model provided opinions that were added.
• Each model showed different properties of the same structure. 
• Each model showed new particles that had been discovered.
• Each model built upon the other to show new particles or properties of previously discovered particles. 

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Which of the following are parts of Dalton's theory?

• All substances are made of atoms.

• Atoms join with other atoms to make new substances.

• Atoms of different elements are different

• All of these are part of his theory

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What was the name of the model pictured behind this question?

• Oatmeal Model

• Rutherford Model

• Bohr Model

• Plum Pudding Model

What two particles are part of the nucleus of an atom?

• Protons and Electrons
• Electrons and Neutrons
• Protons and Neutrons
• Alpha and Beta

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