Atomic Theory

Who stated that all atoms of the same element are excacty alike?

• Democritus
• Dalton
• Thomson
• Borh

How did Rutherford discover the proton?

• Cathode tube ray experiment
• Gold Foil Experiment
• Planetary Model
• Plum Pudding Model

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

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

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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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J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter
• contains negatively charged particles
• has an overall negative charge
• has an overall positive charge

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Who came up with this model of an atom?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick

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The first person to ever talk about an atom was

• Democritus
• Rutherford
• Dalton

This particle is found in the nucleus and has a positive charge

• Electron
• Proton
• Neutron

All matter is made of what?

• energy 
• atoms 
• electrons 
• compounds 

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NGSS.MS-PS1-1

Discovered the electron within the atom

• Thomson
• Chadwick 
• Schrodinger & Heisenberg
• Dalton