Condensed Electron Configurations and Valence Electrons

The video tutorial explains how to write the condensed electron configuration for chlorine. It begins with the full electron configuration, highlighting the importance of valence electrons. The tutorial then demonstrates how to use the periodic table to identify noble gases, such as neon, to simplify the configuration. The final condensed electron configuration for chlorine is presented, emphasizing the role of noble gases in this process.

What is the first step in writing the condensed electron configuration for chlorine?

• Identify the noble gas preceding chlorine.

• Write the full electron configuration.

• Count the number of valence electrons.

• Find the atomic number of chlorine.

What is the atomic number of chlorine?

• 10

• 17

• 18

• 20

Why are valence electrons important in condensed electron configurations?

• They determine the atomic mass.

• They are the electrons in the lowest energy level.

• They are involved in chemical bonding.

• They are the electrons closest to the nucleus.

What is the significance of the highest energy level in electron configurations?

• It contains the core electrons.

• It contains the valence electrons.

• It determines the element's atomic number.

• It is always filled first.

How do you identify the noble gas to use in the condensed electron configuration for chlorine?

• Find the noble gas with the same number of protons as chlorine.

• Look for the noble gas with an atomic number of 17.

• Identify the noble gas with 10 electrons.

• Choose the noble gas with the highest energy level.

Which element is used as the noble gas core in the condensed electron configuration of chlorine?

• Krypton

• Helium

• Neon

• Argon

What is the condensed electron configuration for chlorine?

• [He] 2s2 2p5

• [Ne] 2s2 2p5

• [Ne] 3s2 3p5

• [Ar] 3s2 3p5