Atomic Structure and Valence Electrons

What atom matches this electron configuration?
1s² 2s² 2p⁶ 3s²

• Neon
• Magnesium
• Aluminum
• Potassium

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Which is the electron configuration for an oxygen atom?

• 1s²2s²2p⁶3s²3p⁶4s²
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶

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NGSS.HS-PS1-1

What is the maximum number of electrons that an orbital (a house in electron city) can have?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

How many valence electrons are represented here?

• 7
• 5
• 2
• 8

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What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

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NGSS.HS-PS1-1

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What is the shorthand electron configuration for Sulfur atom?

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p³
  

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NGSS.HS-PS1-1

How many valence electrons does Chlorine have?

• 5
• 2
• 7
• 5

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NGSS.HS-PS1-1

How many valence electrons does phosphorus have?

• 5
• 2
• 8
• 15

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What noble gas should be used to write the shorthand configuration for Te?

• Ar
• Kr
• Xe
• Sb

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NGSS.HS-PS1-1

Identify the element in Period 5 (row) that has 1 valence electron?

• Rb

• Nb

• Ag

• Sb

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