Zn - Zinc

Zinc is a chemical element with the symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a silvery-grey appearance. Zinc is the 24th most abundant element in the Earth’s crust and has five stable isotopes. 

Physical Characteristics

• Appearance: Silvery-grey, shiny metal.
• Atomic Mass: Approximately 65.38 atomic mass units.
• Density: About 7.14 grams per cubic centimeter at room temperature.
• Melting Point: 419.5°C (787.1°F).
• Boiling Point: 907°C (1665°F).

Applications

1. Galvanization: The most common application of zinc is in galvanizing iron or steel to protect against rust. This involves coating the surface of another metal with zinc to provide a protective layer.

2. Alloys: Zinc is a key component in various alloys, including brass (an alloy of copper and zinc), which is used in musical instruments, hardware, and fixtures due to its corrosion resistance and attractive appearance.

3. Batteries: Zinc is used in the production of zinc-carbon and alkaline batteries, providing a source of electrical power in a compact and portable form.

4. Medicine: Zinc compounds, such as zinc oxide, are used in ointments to treat skin conditions like diaper rash and sunburn. Zinc is also an essential trace element necessary for a healthy immune system and is found in various supplements and cold remedies.

Compounds

1. Zinc Oxide (ZnO): Used in rubber manufacture to add strength, in paints as a pigment, and in the pharmaceutical industry as an ingredient in ointments.

2. Zinc Sulfide (ZnS): Utilized in making luminous paints, x-ray screens, and fluorescent lights.

3. Zinc Sulfate (ZnSO₄): Employed as a dietary supplement and in agriculture as a micronutrient fertilizer to treat zinc deficiency in crops.

4. Zinc Chloride (ZnCl₂): Used in deodorants, as a wood preservative, and in the textile and paper industries as a flame retardant and mordant.

Basics on Zinc-Wikipedia