Cobalt Electron Configuration Concepts

This video tutorial explains how to write the electron configuration for cobalt and its ions, Co2+ and Co3+. It begins with an introduction to electron configurations and the importance of the periodic table. The tutorial then provides a step-by-step guide to writing the electron configuration for cobalt, including both the full and abbreviated forms. Finally, it covers how to adjust the configuration for cobalt ions by removing electrons, emphasizing the removal from the 4s orbital first. The video is presented by Dr. B and includes practical tips and references to additional resources.

What is the main focus of the video tutorial?

• Describing the properties of metals

• Discussing chemical reactions

• Writing the electron configuration for cobalt and its ions

• Explaining the periodic table

What is the atomic number of cobalt?

• 28

• 27

• 26

• 29

How many electrons does a neutral cobalt atom have?

• 25

• 26

• 27

• 28

Which orbital block do we start with when writing the electron configuration for cobalt?

• 4s

• 2p

• 3d

• 1s

What is the electron configuration of cobalt in terms of 3d and 4s orbitals?

• 3d6 4s2

• 3d5 4s2

• 3d7 4s2

• 3d8 4s1

Which noble gas is used for the abbreviated electron configuration of cobalt?

• Xenon

• Krypton

• Neon

• Argon

How many electrons are removed to form the Co2+ ion?

• 1

• 2

• 3

• 4

From which orbital are electrons removed first when forming cobalt ions?

• 2p

• 4s

• 3p

• 3d

What is the electron configuration of the Co2+ ion?

• 3d5

• 3d6

• 3d8

• 3d7

What is the electron configuration of the Co3+ ion?

• 3d5

• 3d6

• 3d7

• 3d8