Electron Configuration and Quantum Numbers

This video tutorial covers quantum numbers, electron configurations, and orbital diagrams. It explains how to determine the electron configuration of elements and ions, including exceptions like chromium. The tutorial also discusses paramagnetism and diamagnetism, and how to identify elements from their configurations. Additionally, it explains the significance of quantum numbers and how to determine valence and core electrons.

What is the electron configuration for a neutral fluorine atom?

• 1s2 2p5

• 1s2 2s2 2p6

• 1s2 2s2 2p5

• 1s2 2s2 3p5

Which of the following elements is paramagnetic?

• Neon

• Helium

• Argon

• Fluorine

According to Hund's rule, how should electrons be added to degenerate orbitals?

• All at once with opposite spins

• One at a time with opposite spins

• One at a time with parallel spins

• All at once with parallel spins

What is the principal quantum number (n) associated with?

• The spin of an electron

• The sublevel of an electron

• The specific orbital within a sublevel

• The energy level of an electron

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

• Hund's Rule

• Pauli Exclusion Principle

• Aufbau Principle

• Heisenberg Uncertainty Principle

What is the maximum value that the azimuthal quantum number (l) can take if the principal quantum number (n) is 5?

• 3

• 5

• 6

• 4

If an electron is in the 3p sublevel, what are the possible values for the magnetic quantum number (ml)?

• -3, -2, -1, 0, 1, 2, 3

• 0, 1, 2

• -1, 0, 1

• -2, -1, 0, 1, 2

How many electrons can the 4th energy level hold in total?

• 16

• 18

• 50

• 32

Which of the following electron configurations corresponds to a halogen?

• ns2 np4

• ns2

• ns2 np5

• ns1

What is the electron configuration for an element in group 3A of the periodic table?

• ns2 np3

• ns2 np1

• ns2 np5

• ns1