Quantum Numbers and Electron Configurations

This video tutorial explains how to determine the four quantum numbers (n, l, ml, ms) for electrons in different elements. It uses examples of fluorine, iron, and a 4f5 electron to illustrate the process. The tutorial covers the significance of each quantum number and how they relate to electron configuration and orbitals.

What is the last valence electron configuration for fluorine?

• 4f5

• 2p5

• 3d6

• 1s2

For the 2p5 electron in fluorine, what is the principal quantum number (n)?

• 3

• 4

• 2

• 1

What is the azimuthal quantum number (l) for a p orbital?

• 0

• 1

• 2

• 3

How many possible values can the magnetic quantum number (ml) have when l is 1?

• 3

• 2

• 4

• 1

What is the spin quantum number (ms) for a downward arrow electron?

• -1/2

• +1/2

• +1

• 0

What is the principal quantum number (n) for the last electron in iron, 3d6?

• 5

• 4

• 3

• 2

For the 3d6 electron in iron, what is the azimuthal quantum number (l)?

• 1

• 0

• 2

• 3

In the 3d sublevel, what is the range of possible values for the magnetic quantum number (ml)?

• -3 to 3

• -4 to 4

• -2 to 2

• -1 to 1

What is the azimuthal quantum number (l) for the 4f5 electron?

• 1

• 2

• 0

• 3

For the 4f5 electron, what is the spin quantum number (ms) if the arrow is pointing up?

• +1/2

• +1

• -1/2

• 0