Chromium Electron Configuration Concepts

This video tutorial explains how to write the atomic orbital diagram for chromium, highlighting its unique electron configuration. Chromium, with an atomic number of 24, is an exception in electron configuration due to its stability when the d orbital is half full. The video uses condensed electron notation starting with argon and explains why chromium's configuration is 4s1 3d5 instead of the expected 4s2 3d4. The tutorial also covers the atomic orbital diagram for chromium and compares it to copper, another exception. The video concludes with a recap of the key points.

What is the atomic number of chromium?

• 25

• 23

• 24

• 22

How many electrons does a neutral chromium atom have?

• 23

• 24

• 22

• 25

Which element is used as a starting point in the condensed electron notation for chromium?

• Neon

• Argon

• Krypton

• Xenon

What is the expected electron configuration for chromium before considering its exception?

• [Ar] 4s1 3d5

• [Ar] 4s2 3d4

• [Ar] 4s2 3d5

• [Ar] 4s1 3d4

Why is chromium's electron configuration considered an exception?

• It has a full d orbital.

• It has a half-full d orbital.

• It has an empty d orbital.

• It has a full s orbital.

What is the stable electron configuration for chromium?

• [Ar] 4s1 3d4

• [Ar] 4s1 3d5

• [Ar] 4s2 3d4

• [Ar] 4s2 3d5

In chromium, which orbital has a higher energy level, 4s or 3d?

• 4s

• 3d

• They are equal

• Depends on the element

What is the significance of the 4s and 3d orbitals in chromium's configuration?

• 4s is higher in energy

• 3d is lower in energy

• 3d is higher in energy

• 4s is lower in energy

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

• Copper has an empty d orbital

• Copper has a full d orbital

• Copper has a full s orbital

• Copper has a half-full d orbital

Why is it more stable for chromium to have a half-full 3d orbital?

• It minimizes energy

• It maximizes energy

• It balances protons

• It balances neutrons