Electron Configuration Rules

Identify the Electron Configuration for Aluminum (Al)

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

Tags

NGSS.HS-PS1-1

Which of the following states that electrons occupy orbitals of lowest energy first?

• Hund’s Rule

• Aufbau Principle

• Pauli Exclusion Principle

What is incorrect about this orbital diagram?

• Both arrows in the 2p box should be pointing up

• There are too many electrons in the 1s orbital

• In the 2p boxes, there should only be 1 electron in the first 2p box and one in the 2nd 2p box

• All the arrows should be pointing up

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What does the Pauli Exclusion Principle state?

• An orbital can only hold a maximum of 2 electrons, each with opposite spins

• An orbital can hold a minimum of 6 electrons, each with opposite spins

• An orbital can hold a maximum of 6 electrons, each with the same spin

• An orbital can hold a maximum of 2 electrons, each with the same spin

Which orbital diagram violates of Hund's Rule?

• A

• B

• C

• D

This orbital diagram represents

• Sodium

• Magnesium

• Aluminum

• Iron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2