How many electrons does Si contain? (click to see image)

• 14
• 28
• 2
• None of these

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NGSS.HS-PS1-1

How many electrons does potassium K contain? (click to see image)

• 19
• 39
• 20
• 40

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NGSS.HS-PS1-1

What element is represented in this Bohr Model? 

• Carbon
• Hydrogen
• Aluminum
• Lithium

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NGSS.HS-PS1-1

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many dots would a Lewis Dot structure of Helium have?

• 1
• 2
• 8
• 0

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NGSS.HS-PS1-1

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

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NGSS.HS-PS1-1

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

How many electrons are in the outer shell of Sodium (Na)?

• 3
• 1
• 2
• 4

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NGSS.HS-PS1-1

?

• Boron
• Carbon
• Nitrogen
• Lithium

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What Element does this Bohr Model show?

• Helium

• Hydrogen

• Argon

• Silver

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NGSS.HS-PS1-1