Science 8 U3 - Atomic Structure, Atomic Theory, Ions/Isotopes

Which letter represents an electron?

• A

• B

• C

• D

• E

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How many valence electrons does this atom have?

• 8

• 2

• 1

• 11

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What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

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What subatomic particle(s) would be found orbiting the nucleus?

• Neutrons only
• Electrons only
• Protons and Neutrons
• Protons and Electrons

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How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

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Where is most of the MASS of an atom located?

• In the nucleus

• Electron cloud

• In the electron

• Evenly spread throughout the atom

Where are the Electrons found in the structure of an atom?

• In the nucleus
• In spaces around the nucleus

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NGSS.MS-PS1-1

Which two subatomic particles make up the nucleus of an atom?

• Protons and Electrons
• Neutrons and Electrons
• Electrons and Protons
• Protons and Neutrons

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In a neutral atom,

• protons = electrons

• protons = neutrons

• neutrons = electrons

• protons = neutrons = electrons

The mass of an atom is

• equal to the number of protons

• the protons + electrons

• the protons + neutrons

• the protons + neutrons + electrons

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