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Zinc

30
65.38
Zn
Zinc

Element Stats

Select a temperature unit to update boiling and melting point values.

Physical

Physical Properties
PropertyValuePropertyValue
AppearanceSilvery-white metal with a blue tinge
ClassificationTransition MetalsDensity7.14 g/cm³ at STP
Boiling Point1180 KMelting Point692.68 K

Atomic

Atomic Properties
PropertyValuePropertyValue
Atomic Number30Atomic Mass65.382
Van Der Waals Radius139Atomic Radius (empirical)134

Electronic & Chemical

Electronic and Chemical Properties
PropertyValuePropertyValue
Electronegativity1.65Electron Affinity-58 kJ/mol
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10
Oxidation States-2, 0, +1, +2
Ionization Energies

Showing 5 of 21 ionization energies.

  1. 906.4 kJ/mol
  2. 1733.3 kJ/mol
  3. 3833 kJ/mol
  4. 5731 kJ/mol
  5. 7970 kJ/mol

History

Zinc has been used by humans for thousands of years. But for a long time, people didn’t know what they were working with!

Archaeological finds show that zinc was used to make brass as early as 1300 BCE in Greece and, later, Rome. However, it is likely that zinc only came to be separated and purified as a distinct metal starting around 1100 CE in India.

In 1746, German chemist Andreas Marggraf separated zinc from calamine—a zinc ore historically used in medicines. You may have used calamine lotion for poison ivy and other rashes. Marggraf documented the process in detail, which is why he generally gets the credit for discovering zinc in the West (even though four years earlier, British chemist William Champion had patented a process for separating zinc).

Although researchers are confident that the word “zinc” comes from the German zink, nobody is quite sure why the element took this name. One theory holds that zink comes from zinke, meaning “jagged” or “tooth-like,” perhaps in reference to the pointy appearance of zinc crystals.

Properties

Zinc is a metal that reacts with acids and alkalis; its chemistry is a lot like nickel and copper (which are also first-row transition metals). Zinc is a bluish-white metal that is hard and brittle at most temperatures. It has a relatively low melting point. Zinc tarnishes in air and its compounds tend to be colorless.

Uses

Most zinc is used in the process of galvanization, which involves applying a coating of zinc to prevent steel or iron from rusting (more than 50 percent of metallic zinc is used in galvanization). Galvanized metal is used in everything from automobiles to buildings, boats, and bridges.

Zinc is also used to produce brass (an alloy of copper and zinc), along with other metal alloys, such as aluminum solder. And zinc oxide is used in paint pigments, semiconductors, fire retardants, rubber, pharmaceuticals, and more.

Although zinc has historically been prescribed as a medication, today there are few medications that contain zinc. However, zinc is a vital trace element for humans, and you’ll still find it in vitamins and nutritional supplements.

Forms

In nature, you’ll find zinc in five stable (non-radioactive) isotopes: zinc-64, -66, -67, -68, and -70. Zinc-64 is the most common of these (about half of natural zinc is in this form).

Scientists have characterized about 25 unstable, or radioactive, isotopes whose half-lives range from 244 days (for zinc-65) to much less than one second.

Sources

Zinc is produced from ores such as zinc blende (aka sphalerite) and other ores. In 2022, China was the largest producer of zinc, followed by Peru and Australia, although zinc is mined in countries around the world. Iron, aluminum, and copper are the only metals produced in greater quantities than zinc.

Up to 30 percent of the zinc produced globally comes from recycling. Some elements are too valuable to use just once!

Fun Facts

Beach Vibes

Lifeguards in old movies have white noses because they’re using a zinc-based sunblock.

Winner, winner, chicken dinner

The dark meat of a chicken has twice as much zinc as the light meat.

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