Mastering Orbital Diagrams and Electron Configurations in Chemistry

The video tutorial explains orbital diagrams, which are visual representations of electron configurations. It starts with simple examples like hydrogen and helium, then progresses to more complex elements such as lithium, boron, carbon, neon, and magnesium. The tutorial emphasizes the importance of electron spin and the rules governing orbital filling, including the Pauli Exclusion Principle and the Aufbau Principle. These rules dictate that orbitals can hold up to two electrons with opposite spins and must be filled from the lowest energy level upwards.

What is the electron configuration of hydrogen?

• 2p1

• 2s1

• 1s2

• 1s1

In an orbital diagram, what does an arrow represent?

• An atom

• A neutron

• A proton

• An electron

How many electrons can the s orbital hold?

• 3

• 2

• 4

• 1

What is the electron configuration of lithium?

• 1s2 2s1

• 1s2 2s2

• 1s1 2s2

• 1s2 2p1

How many orbitals does the p sublevel have?

• 3

• 4

• 2

• 1

What is the electron configuration of carbon?

• 1s2 2s1 2p1

• 1s2 2p2

• 1s2 2s2 2p6

• 1s2 2s2 2p2

In neon's electron configuration, how do the electrons fill the p orbitals?

• All spin up first, then pair

• Randomly

• All pair up first

• All spin down first

What is the electron configuration of neon?

• 1s2 2s2 2p2

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2p6

Which principle states that orbitals can hold up to two electrons with opposite spins?

• Hund's Rule

• Pauli Exclusion Principle

• Aufbau Principle

• Bohr's Model

What is the electron configuration of magnesium?

• 1s2 2p6 3s2

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3p2

• 1s2 2s2 3s2