Understanding Electron Configurations

What is the electron configuration of oxygen?

• 1s² 2s² 2p⁵

• 1s² 2s² 2p²

• 1s² 2s² 2p⁴

• 1s² 2s² 2p³

Define the four quantum numbers and their significance.

• 1) Principal (n), 2) Radial (r), 3) Orbital (o), 4) Spin (s)

• The four quantum numbers are: 1) Principal (n), 2) Azimuthal (l), 3) Magnetic (m_l), 4) Spin (m_s).

• 1) Energy (E), 2) Angular (a), 3) Linear (l), 4) Magnetic (m)

• 1) Principal (p), 2) Orbital (o), 3) Quantum (q), 4) Charge (c)

How is noble gas notation used in electron configurations?

• Noble gas notation is a method for calculating atomic mass.

• Noble gas notation only applies to transition metals.

• Noble gas notation is used to represent all electrons in an atom.

• Noble gas notation is used in electron configurations to represent core electrons with the configuration of the nearest noble gas, focusing on valence electrons.

What is the correct electron configuration for sodium?

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 3s²

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

Explain the Aufbau principle in orbital filling.

• Electrons can only occupy the same orbital if they have opposite spins.

• Electrons fill orbitals randomly without any specific order.

• The Aufbau principle states that electrons fill the highest energy levels first.

• The Aufbau principle describes the order in which electrons fill atomic orbitals, starting from the lowest energy level to the highest.

What is Hund's Rule and how does it apply to electron configurations?

• Hund's Rule states that electrons must fill the lowest energy orbitals first before occupying higher ones.

• Hund's Rule indicates that all electrons in an atom must be paired before any can be unpaired.

• Hund's Rule is a principle in quantum mechanics that dictates the distribution of electrons in orbitals, ensuring that each orbital in a subshell is singly occupied before any orbital is doubly occupied.

• Hund's Rule applies only to the first two electrons in an atom's electron configuration.

State the Pauli Exclusion Principle and its implications.

• All particles can occupy the same quantum state without restriction.

• No two fermions can occupy the same quantum state simultaneously.

• The Pauli Exclusion Principle applies only to bosons.

• Fermions can occupy the same quantum state if they have different spins.

What is the electron configuration for the element with atomic number 26?

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷

How do you determine the maximum number of electrons in a given orbital?

• 1 electron

• 3 electrons

• 2 electrons

• 4 electrons

What is the noble gas configuration for chlorine?

• [Ar] 4s² 3d¹⁰

• [Ne] 3s² 3p⁵

• [He] 2s² 2p⁶

• [Ne] 3s² 3p⁴