Shorthand Electron Configurations and Rogue Electrons

The video tutorial covers electron configuration, focusing on the shorthand version. It explains how to determine electron structures using the periodic table and highlights the importance of understanding subshell filling. The tutorial provides examples with elements like arsenic, magnesium, and chlorine, and discusses transition elements and exceptions such as chromium and copper. The video concludes with a summary of key points.

What is the main advantage of using shorthand electron configuration?

• It provides a detailed view of all electron positions.

• It allows for the prediction of chemical reactions.

• It simplifies the representation for elements with many electrons.

• It eliminates the need for periodic table references.

Which noble gas is used as a reference for the shorthand configuration of arsenic?

• Neon

• Xenon

• Argon

• Krypton

For magnesium, which noble gas is used in its shorthand electron configuration?

• Helium

• Neon

• Argon

• Krypton

What is the shorthand electron configuration for chlorine after the noble gas?

• [Ar] 3s2 3p5

• [Ne] 3s2 3p5

• [Ne] 3s1 3p6

• [Ar] 3s1 3p6

In the case of nickel, which subshells can be written in either order?

• 2s and 2p

• 4s and 3d

• 5s and 4d

• 3s and 3p

What is the shorthand electron configuration for nickel?

• [Ar] 4s2 3d8

• [Ar] 3d8 4s2

• [Ne] 3d8 4s2

• [Ne] 4s2 3d8

Which element has a 'rogue' electron configuration of [Ar] 4s1 3d5?

• Zinc

• Copper

• Chromium

• Iron

What is the expected electron configuration for copper, and what is its actual 'rogue' configuration?

• Expected: [Ar] 4s2 3d9, Actual: [Ar] 4s1 3d10

• Expected: [Ar] 4s1 3d10, Actual: [Ar] 4s2 3d9

• Expected: [Ne] 4s2 3d9, Actual: [Ne] 4s1 3d10

• Expected: [Ne] 4s1 3d10, Actual: [Ne] 4s2 3d9

Why are chromium and copper considered to have 'rogue' electron configurations?

• They have fewer electrons than expected.

• Their configurations match the expected order.

• Their configurations deviate from the expected order.

• They have more electrons than expected.

Which of the following elements is NOT mentioned as having a 'rogue' electron configuration?

• Chromium

• Copper

• Arsenic

• Nickel