Unit 2: Electron configuration

What do you start an electron configuration with?

• 1s²

• 1d¹⁰

• 1f¹⁴

• 1p⁶

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Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?

• Hund’s Rule
• Aufbau Principle
  
• Pauli Exclusion Principle

Electrons are paired based on their spin directions, clockwise and counterclockwise, is what electron configuration rule?

• Hund’s Rule
• Aufbau Principle
  
• Pauli Exclusion Principle

Write the electron configuration for the element.

• 1s¹2s¹2p³3s¹

• 1s²2s²2p⁵3s¹

• 1s2s2p3s

• 1s²2s²2p⁶3s¹

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This orbital diagram represents:

• C (6)

• B (5)

• N (7)

• O (8)

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What is the correct electron configuration for Phosphorus (15)?

• 1s²2s²2p⁶3s²3p⁴

• 1s²2s²2p⁶3s²3d³

• 1s²2s²2p⁶3s²3p³

• 1s2s2p3s3p

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NGSS.HS-PS1-1

What is the correct electron configuration for Titanium (22)?

• 1s²2s²2p⁶3s²3p⁴

• 1s²2s²2p⁶3s²3p⁶4s²3d²

• 1s²2s²2p⁶3s²3p⁶4s²4p²

• 1s²2s²2p⁶3s²3p⁶4s²4d²

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NGSS.HS-PS1-1

The electron configuration for Nitrogen is 1s²2s²2p³. What would the electron configuration of the ion look like if Nitrogen has a -3 charge?

• 1s²2s²2p⁶

• 1s²2s²

• 1s²2s²2p³

• 1s²2s²2p⁵

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NGSS.HS-PS1-1

Choose the Noble Gas that you would use to begin the shorthand configuration of the following element.

Iron

• [He]

• [Ne]

• [Ar]

• [Kr]

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What is the shorthand configuration for Lead?

• [Xe]6s²4f¹⁴5d¹⁰6p²

• [Xe]6s²5d¹⁰6p²

• [Rn]6s²5d¹⁰6p²

• [Rn]6s²4f¹⁴5d¹⁰6p²

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