Question

Which element is a metal?
O A. Ne
O B. Xe
C. F
D. Mo

Answer 1

Mo (Molybdenum) is a transition metal and is the only metal among the provided elements. Neon and Xenon are noble gases, and Fluorine is a halogen, both categories being nonmetals. option a

Step-by-step explanation:

The element Mo (Molybdenum) is a metal. In the options provided, A. Ne (Neon) and B. Xe (Xenon) are noble gases, which are nonmetals, and C. F (Fluorine) is a halogen, which is also a nonmetal. Therefore, D. Mo is the correct answer as it is classified as a transition metal, one of the main categories of metals in the periodic table.

Metals are characterized by their shiny appearance and their good conductivity of heat and electricity. Molybdenum specifically is used in alloys to enhance strength and resistance to corrosion, which are typical properties of transition metals. Transition metals occupy the central block of the periodic table and are known for their ability to form variable oxidation states and complex ions.

Answer 2

D. Molybdenum

So a metal is: a class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity.

So what is molybdenum?

It has the atomic number 42 and is a silvery-gray transition metal. Although the free element is not found in nature, it has an extremely high melting point—the sixth highest of all known elements. It is mostly mined and manufactured for alloying, notably with steel.

Uses for molybdenum metal include:

• An alloying agent gives quenched and tempered steels their hardenability and toughness. Additionally, it increases steels' strength at high temperatures (red-hardness).
• In nickel-based alloys (such Hastelloys) and stainless steels, it gives chemical solutions heat resistance and corrosion resistance.
• Electrodes for forehearths and glass furnaces that use electricity for heating.
• Uses for nuclear energy, such as in missile and aircraft parts (where high temperature resistance is vital).
• As a catalyst in the petroleum refining process.
• In electronic and electrical applications as a filament material.
• As a pillar of support for lightbulbs and radios.
• Electric connections that are arc resistant.
• Sheaths for thermocouples
• Coatings for other metals that prevent corrosion and flames (generally arc deposited for metallising).