Molybdenum Electron Configuration Concepts

This video tutorial explains how to write the electron configuration for molybdenum (Mo) and its ion Mo3+. It covers the use of the periodic table and orbital blocks to determine electron distribution, highlights special cases and stability rules, and demonstrates the process for configuring electrons in ions.

What is the atomic number of molybdenum?

• 43

• 40

• 41

• 42

Why is molybdenum considered a special case in electron configuration?

• It is an exception due to its electron arrangement.

• It has more protons than electrons.

• It has a full outer shell.

• It is a noble gas.

What is the significance of orbital blocks in the periodic table?

• They show the number of neutrons.

• They assist in figuring out electron configurations.

• They determine the atomic mass.

• They help identify the number of protons.

Which orbital is filled after 4s in the electron configuration of molybdenum?

• 5s

• 4d

• 4p

• 3d

Why is it more stable to have a half-filled d orbital?

• It reduces the atomic mass.

• It increases the number of protons.

• It provides greater stability.

• It decreases the atomic number.

How many electrons are removed to form Mo3+ from Mo?

• 1

• 2

• 3

• 4

Which electrons are typically removed first when forming ions from transition metals?

• f electrons

• p electrons

• s electrons

• d electrons

What is the electron configuration for Mo3+?

• [Kr] 4d^4 5s^0

• [Kr] 4d^5 5s^1

• [Kr] 4d^3

• [Kr] 4d^3 5s^1

What happens to the 5s electrons in the electron configuration of Mo3+?

• They are completely filled.

• They remain unchanged.

• They are partially filled.

• They are removed.

What is the final electron configuration for molybdenum?

• [Kr] 4d^3 5s^2

• [Kr] 4d^6 5s^0

• [Kr] 4d^4 5s^2

• [Kr] 4d^5 5s^1