Electron Configuration and Orbital Notation

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

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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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Which electron configuration belongs to Chlorine (Cl)?

• 1s² 2s² 2p⁶ 3s² 3p⁵
• 1s² 2s² 2p⁶ 3s² 3p⁶
• 1s² 2s² 2p⁶ 3s² 3p⁷

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How many electrons can the d sublevel hold?

• 14
• 10
• 2
• 6

How many electrons can the s sublevel hold?

• 14
• 10
• 2
• 6

How many electrons can the p sublevel hold?

• 14
• 10
• 2
• 6

How many valence electrons are represented here?

• 7

• 5

• 2

• 8

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What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

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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

What is the number of valence electrons for Carbon?

• 12
• 6
• 5
• 4

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