Chapter 2

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

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Ernst Rutherford discovered which part of the atom through the use of gold foil?

• Proton
• Neutron
• Electron
• Orbitals

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All matter is made of what?

• energy 
• atoms 
• electrons 
• compounds 

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

• Democritus
• Dalton
• Thomson
• Borh

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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Place the following scientists in order, from earliest to latest: 
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton

• B,C,A
• C,A,B
• A,C,B
• C,B,A

What is the smallest particle of an element?

• atom
• proton
• electron
• neutron

An atom's overall charge is ________.

• positive 
• depends
• neutral 
• negative 

What is the amu of a neutron?

• almost zero
• 1
• 2

Which scientist disagreed with the idea that atoms existed?

• Democritus
• Aristotle
• Rutherford