Exploring Electron Configuration and Orbital Notation

This video tutorial covers electron configurations and orbital notation, explaining the principles of Aufbau, Pauli Exclusion, and Hund's Rule. It details the format of electron configurations and their connection to the periodic table. The tutorial provides a step-by-step guide to writing electron configurations, with examples using carbon and iron. It introduces shorthand and orbital notation, emphasizing the role of noble gases. The video concludes with a summary and preparation for the next class.

Which principle states that electrons fill the lowest energy orbitals first?

• Bohr Model

• Aufbau Principle

• Pauli Exclusion Principle

• Hund's Rule

According to the Pauli Exclusion Principle, how many electrons can occupy a single orbital?

• One

• Two

• Three

• Four

What does Hund's Rule state about electron placement in orbitals of equal energy?

• Electrons pair up before filling empty orbitals

• Electrons fill the lowest energy orbitals first

• Electrons fill empty orbitals with the same spin before pairing up

• Electrons have opposite spins in the same orbital

How many electrons can the second energy level hold?

• 32

• 2

• 8

• 18

Which sub-level is first to appear in the third energy level?

• 4s

• 3s

• 3p

• 3d

What is the atomic number of carbon?

• 4

• 6

• 8

• 12

In the electron configuration of iron (Fe), which sub-level comes after 4s?

• 4p

• 3p

• 3d

• 4d

Which noble gas is used as a reference for the shorthand notation of chlorine?

• Helium

• Neon

• Argon

• Krypton

What does the shorthand notation [Ne] represent in the electron configuration?

• 1s2 2s2 2p6 3s2 3p5

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6

In orbital notation, what do the arrows represent?

• Protons

• Energy levels

• Sub-levels

• Electrons and their spins