Atomic Structure and Electron Configuration

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

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The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

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NGSS.HS-PS1-1

Identify the Electron Configuration for Aluminum (Al)

• 1s² 2s² 2p⁶ 3s² 3p¹
• 1s² 2s² 2p⁶ 3s² 3p³
• 1s² 2s² 2p⁶ 3s² 4p¹

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NGSS.HS-PS1-1

How many valence electrons are represented here?

• 7
• 5
• 2
• 8

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How many electrons can the d sublevel hold?

• 8
• 10
• 2
• 4

What is the shorthand electron configuration for Sulfur atom? (Unfamiliar Situation)

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

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NGSS.HS-PS1-1

What element in Period 4 has 5 valence electrons? (Unfamiliar Situation)

• Zr
• As
• V
• Sb

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As you move down the periodic table atoms get bigger.  This is because ____________. (Unfamiliar Situation)

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more neutrons

What are the maximum number of electrons that go on the first 3 energy levels?

• 2,4,16
• 2,8,18
• 4,8,12
• 3,4,6

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What are valence electrons?

• electrons on the first orbital always
• nucleus
• the outermost shell
• the number of electrons on the outermost orbital

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NGSS.HS-PS1-1

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