Exploring Electron Configuration

What is the electron configuration of oxygen?

• 1s² 2s² 2p³

• 1s² 2s² 2p²

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁵

How many electrons can the first energy level hold?

• 2

• 4

• 8

• 1

What is the maximum number of electrons in the second energy level?

• 8

• 2

• 10

• 4

What does the notation '1s² 2s² 2p⁶' represent?

• Electron configuration of Argon (Ar)

• Electron configuration of Neon (Ne)

• Electron configuration of Carbon (C)

• Electron configuration of Sodium (Na)

Which element has the electron configuration 'Ne'?

• Carbon

• Neon

• Oxygen

• Hydrogen

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

• The Aufbau principle states that electrons can occupy any available energy level.

• The Aufbau principle is only relevant for noble gases and not for other elements.

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

• The Aufbau principle describes the process of electron removal from an atom.

How do you determine the number of valence electrons in an element?

• Valence electrons can be calculated using the element's electron affinity.

• The number of valence electrons is determined by the group number of the element in the periodic table.

• The number of valence electrons is the same for all elements in the same period.

• The number of valence electrons is determined by the atomic mass of the element.

What is the electron configuration for a sodium ion (Na⁺)?

• 1s² 2s² 3p⁶

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁵

Which sublevel is filled after 4s in the periodic table?

• 3p

• 3d

• 5s

• 4p

What is the electron configuration for chlorine?

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p³

• 1s² 2s² 2p⁶ 3s² 3p⁴

• 1s² 2s² 2p⁶ 3s² 3p⁶