RETEST - Unit 4: Atomic Theory/Structure/The Mole

How did Rutherford discover the proton?

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

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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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The majority of an atom's mass exists where?

• In the nucleus
• In the electron cloud
• In the space between the nucleus and the electrons
• In the neutrons

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Which particle is responsible for the chemical properties of an atom?

• Neutron
• Protons
• Valence Electrons
• Nucleus

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Neon has an atomic number of 10 and an atomic mass of 20.180.  How many protons, electrons, and neutrons will it have?

• P=10 E=10 N=11
• P=5  E=5  N=10
• P=10  E=10  N=10
• P=10  E=5  N=5

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What element is pictured?

• Hydorgen
• Boron
• Beryllium
• Arsenic

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The atomic number for Oxygen is 8, so

• there are 8 protons in the atom
• the atomic mass is less than 8
• the mass of the atom is 8
• the atom is decaying

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According to Chadwick, what does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

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What is an ion?

• A Charged Atom
• A Large Atom
• A Small Atom
• A Cute Atom

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Cations are...

• Positive
• Negative
• Neutral
• Purring

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