Unit 2: Atomic Structure Review

The center of an atom is known as the

• nucleus

• electron cloud

• neutron cloud

• mass circle

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These particles have a mass of 1 amu

• protons and neutrons
• protons and electrons
• neutrons and electrons

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Protons have this type of charge

• positive
• negative
• neutral - no charge

A particle that orbits around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

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What does the nucleus of an atom contain?

• Electrons and neutrons

• Protons and neutrons

• Neutrinos and positrons

• Electrons and megatrons

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What are the 3 subatomic particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

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This subatomic particle has basically no mass

• protons
• neutrons
• electrons
• protons and neutrons

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Neutrons have this type of charge

• positive
• negative
• neutral - no charge

The atomic number of an atom is the number of 

• protons in its electron cloud
• protons in its nucleus
• neutrons in its nucleus
• electrons and neutrons in the nucleus

An atom with atomic number 6 would have how many protons?

• 6
• 12
• 3
• cannot be determined 

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