Exploring Molybdenum: Properties and Uses

What is the atomic number of Molybdenum?

• 42

• 40

• 44

• 38

Describe the crystal structure of Molybdenum.

• Molybdenum has a simple cubic (SC) crystal structure.

• Molybdenum has a body-centered cubic (BCC) crystal structure.

• Molybdenum has a hexagonal close-packed (HCP) crystal structure.

• Molybdenum has a face-centered cubic (FCC) crystal structure.

What is the melting point of Molybdenum in degrees Celsius?

• 1500

• 3200

• 1800

• 2623

How does Molybdenum react with oxygen at high temperatures?

• Molybdenum forms molybdenum dioxide (MoO2) when heated in oxygen.

• Molybdenum reacts with oxygen to produce water vapor (H2O).

• Molybdenum does not react with oxygen at any temperature.

• Molybdenum reacts with oxygen to form molybdenum trioxide (MoO3) at high temperatures.

List one common industrial application of Molybdenum.

• Manufacturing of electrical contacts

• Production of aluminum alloys

• Creation of plastic composites

• Production of high-strength steel alloys

What role does Molybdenum play in steel production?

• Molybdenum is used to increase the color of steel.

• Molybdenum improves strength, hardness, and corrosion resistance in steel.

• Molybdenum reduces the weight of steel.

• Molybdenum acts as a lubricant in steel production.

Explain the significance of Molybdenum in biological systems.

• Molybdenum is essential for photosynthesis in all organisms.

• Molybdenum is primarily used in the production of steel.

• Molybdenum is a key component of chlorophyll in plants.

• Molybdenum is significant in biological systems as a cofactor for enzymes involved in nitrogen and sulfur metabolism.

What is the density of Molybdenum?

• 9.81 g/cm³

• 10.28 g/cm³

• 8.96 g/cm³

• 12.01 g/cm³

How does Molybdenum contribute to the strength of alloys?

• Molybdenum decreases the ductility of alloys at low temperatures.

• Molybdenum has no effect on the strength of alloys.

• Molybdenum primarily enhances the electrical conductivity of alloys.

• Molybdenum increases the strength and hardness of alloys, especially at elevated temperatures.

What are the common oxidation states of Molybdenum?

• +1, +7

• +0, -1

• +2, +3, +4, +5, +6

• +8, +9