Exploring Electron Configuration

What is the electron configuration of oxygen?

• 1s² 2s² 2p⁴

• 1s² 2s² 2p²

• 1s² 2s² 2p⁵

• 1s² 2s² 2p³

How many electrons can the first shell hold?

• 2

• 10

• 8

• 1

What is the significance of the Aufbau principle in electron configuration?

• It explains the periodic table layout.

• It determines the mass of an atom.

• It describes the color of elements.

• The Aufbau principle is significant as it guides the arrangement of electrons in an atom, determining its chemical behavior.

Describe the electron configuration for a sodium atom.

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 3p⁶ 3s¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s¹

What is the maximum number of electrons in the p subshell?

• 4

• 6

• 10

• 8

How does the Pauli exclusion principle affect electron configuration?

• Electron configuration is determined solely by the number of protons in the nucleus.

• The Pauli exclusion principle allows for multiple electrons in the same quantum state.

• The Pauli exclusion principle requires that no two electrons in an atom can have identical quantum numbers, affecting how electrons are arranged in orbitals.

• Electrons can occupy the same orbital if they have different energies.

What is the electron configuration for a chlorine atom?

• 1s² 2s² 2p⁶ 3s² 3p⁴

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p³

• 1s² 2s² 2p⁶ 3s² 3p⁵

Explain the concept of valence electrons in relation to electron configuration.

• Valence electrons are the total number of electrons in an atom.

• Valence electrons are always found in the innermost shell of an atom.

• Valence electrons are the outermost electrons that determine an atom's chemical properties, and they are identified from the electron configuration.

• Valence electrons do not influence an atom's reactivity.

What is the electron configuration for a transition metal?

• [noble gas] ns^2 (n-1)d^10

• [noble gas] ns^1 (n-1)d^x

• [noble gas] ns^2 (n-1)d^x

• [noble gas] ns^2 (n-1)d^5 s^1

How do you determine the electron configuration for an ion?

• Adjust the electron count based on the ion's charge and fill the orbitals accordingly.

• Ignore the ion's charge when filling orbitals.

• Use the same electron configuration as the neutral atom.

• Count only the protons in the ion.