Understanding Electron Configurations

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?

Explain how Hund's Rule affects the electron configuration of nitrogen.

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.

Draw the orbital diagram for carbon and explain the arrangement of electrons.

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NGSS.HS-PS1-1

How many valence electrons does a chlorine atom have?

• 5

• 6

• 7

• 8

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NGSS.HS-PS1-1

• Fluorine

• Chlorine

• Bromine

• Iodine

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NGSS.HS-PS1-1

Using the Aufbau Principle, determine the electron configuration for the element with atomic number 26.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Describe how the Pauli Exclusion Principle is applied in the electron configuration of helium.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2