Electron Configurations and Exceptions

The video tutorial explains the exceptions in electron configurations for certain elements, focusing on chromium, molybdenum, copper, silver, and gold. These elements deviate from the expected electron configurations due to stability reasons, where electrons are moved to lower energy orbitals. The tutorial provides detailed explanations and diagrams to illustrate these exceptions, emphasizing the importance of understanding these unique configurations.

What is the main reason for the existence of electron configuration exceptions?

• Atoms prefer to have unpaired electrons in lower energy orbitals.

• Atoms prefer to have paired electrons.

• Atoms prefer to have electrons in higher energy states.

• Atoms prefer to fill the s orbitals before d orbitals.

What is the correct electron configuration for chromium?

• Argon 4s2 3d4

• Argon 4s1 3d5

• Argon 4s1 3d4

• Argon 4s2 3d5

Why does chromium have an electron configuration of Argon 4s1 3d5?

• To fill the 4s orbital completely.

• To have all valence electrons unpaired in lower energy orbitals.

• To have a higher energy state.

• To have all electrons paired.

What is the electron configuration of molybdenum?

• Krypton 5s1 4d4

• Krypton 5s2 4d5

• Krypton 5s1 4d5

• Krypton 5s2 4d4

How does molybdenum's electron configuration compare to chromium's?

• Both have paired electrons in the s orbital.

• Both have unpaired electrons in the d orbital.

• Both have a filled 5s orbital.

• Both have a filled 4s orbital.

What is the correct electron configuration for copper?

• Argon 4s1 3d9

• Argon 4s2 3d10

• Argon 4s1 3d10

• Argon 4s2 3d9

Why does copper have an electron configuration of Argon 4s1 3d10?

• To have all electrons paired.

• To have a more stable lower energy state.

• To fill the 4s orbital completely.

• To have a higher energy state.

Which elements share a similar electron configuration exception with copper?

• Vanadium and manganese

• Silver and gold

• Chromium and molybdenum

• Iron and cobalt

What is the electron configuration of silver?

• Krypton 5s1 4d9

• Krypton 5s2 4d10

• Krypton 5s1 4d10

• Krypton 5s2 4d9

What is the electron configuration of gold?

• Xenon 6s1 4f14 5d9

• Xenon 6s1 4f14 5d10

• Xenon 6s2 4f14 5d9

• Xenon 6s2 4f14 5d10