Exploring Electron Configurations

What is the electron configuration of Carbon (Z=6)?

• 1s² 2s² 2p³

• 1s² 2s² 2p²

• 1s² 2s² 2p⁴

• 1s² 2s² 2p¹

Using noble gas notation, what is the configuration for Argon (Z=18)?

• [Ne] 3s² 3p⁶

• [Ar] 4s² 3d¹⁰

• [Ne] 3s² 3p⁵

• [He] 2s² 2p⁶

How many valence electrons does Sodium (Z=11) have?

• 1

• 0

• 3

• 2

Identify the element with the electron configuration [Ne]3s². What is its name and symbol?

• Aluminum (Al)

• Magnesium (Mg)

• Calcium (Ca)

• Silicon (Si)

Determine the number of valence electrons in Chlorine (Z=17).

• 7

• 8

• 5

• 10

What is the orbital notation for Oxygen (Z=8)?

• 1s² 2s² 2p³

• 1s² 2s² 2p⁵

• 1s² 2s² 2p⁴

• 1s² 2s¹ 2p⁶

Which block does Iron (Z=26) belong to in the periodic table?

• f-block

• s-block

• p-block

• d-block

Predict the electron configuration for an element in Group 2, Period 4.

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4p²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Identify the element with the electron configuration [Kr]5s²4d¹⁰5p⁵. What is its name and symbol?

• Tellurium (Te)

• Iodine (I)

• Xenon (Xe)

• Bromine (Br)

How many valence electrons does Phosphorus (Z=15) have?

• 3

• 4

• 6

• 5