Quantum Numbers and Electron Configurations

What is the shorthand method used to represent the electron configuration of an element by referencing the configuration of the nearest noble gas?

• Aufbau notation

• Pauli shorthand

• Hund's rule notation

• 1. Noble gas configuration

The electron configuration for nitrogen (N) is 1s²2s²2p³. Which principle is violated by this configuration?

• Aufbau Principle

• Pauli Exclusion Principle

• Hund's Rule

• 1. None of the above

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NGSS.HS-PS1-1

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Which of the following electron configurations represents a noble gas element?

• 1s²2s²2p⁶3s²3p⁵

• 1s²2s²2p⁶

• 1s²2s²2p⁵

• 1. 1s²2s²2p⁶3s¹

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NGSS.HS-PS1-1

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Electron configurations can be used to:

• predict the physical properties of an element

• predict the chemical properties of an element

• determine the number of neutrons in an atom

• 1. determine the element's position in the periodic table

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NGSS.HS-PS1-1

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Which of the following statements about electron configurations is FALSE?

• They use letters (s, p, d, f) to represent the sublevels.

• They show the order in which electrons fill the orbitals.

• They use numbers (1, 2, 3, ...) to represent the energy levels.

• 1. They can be used to predict the reactivity of an element.

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NGSS.HS-PS1-1

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When filling degenerate orbitals, Hund's Rule states that electrons first fill each orbital:

• completely before moving to the next

• halfway before pairing up

• with the same spin

• 1. with the same energy

Which of the following statements best describes the Pauli Exclusion Principle?

• No two electrons in an atom can have the same set of four quantum numbers.

• Electrons fill orbitals starting with the lowest energy level.

• Electrons will fill degenerate orbitals singly before pairing.

• Electrons in the same orbital must have opposite spins.

How does Hund's Rule apply to the electron configuration of oxygen?

What is the electron configuration of a neutral oxygen atom?

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NGSS.HS-PS1-1

According to the Aufbau Principle, which orbital will be filled first?