Atomic Theory and Structure Review

What new scientific evidence led to changes in Dalton’s atomic theory?

• The discovery of subatomic particles

• The discovery of chemical reactions

• The discovery of isotopes

• The discovery of molecules

What did J. J. Thomson discover about electrons?

• Electrons are positively charged and part of a negatively charged atom

• Electrons are negatively charged and part of a positively charged atom

• Electrons are neutral and part of a positively charged atom

• Electrons are positively charged and part of a positively charged atom

What was Rutherford’s contribution to the structure of an atom?

• He discovered the electron cloud

• He named the center of the atom the Nucleus that contained + charged protons and that electrons move in an orbit

• He discovered the neutron

• He discovered the proton

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What is the structure of an atom?

• An atom has a nucleus containing protons and neutrons, with electrons in an electron cloud surrounding the nucleus

• An atom has only protons and electrons

• An atom has only neutrons and electrons

• An atom has a nucleus containing only protons, with electrons in an electron cloud surrounding the nucleus

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Where can I find a proton?

• Found in the electron cloud

• Found in the nucleus

• Found in the orbit

• Found in the outer shell

Where would I find a neutron?

• Found in the electron cloud

• Found in the nucleus

• Found in the orbit

• Found in the outer shell

Where can I find an electron?

• Found in the nucleus

• Found in the electron cloud surrounding the nucleus

• Found in the orbit

• Found in the outer shell

What are the forces that exist inside an atom between subatomic particles?

• Gravitational force

• Electromagnetic force

• Nuclear force

• Frictional force

What charge do protons have?

• Negative charge

• No charge

• Positive charge

• Neutral charge

How can a neutral atom become positively or negatively charged?

• By gaining or losing protons

• By gaining or losing neutrons

• By gaining or losing electrons

• By gaining or losing mass

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