Rarest Element On Earth
The rarest element on this planet is Astatine. The atomic number of Astatine is 85 and At is the symbol used to represent it in the periodic table. Astatine is derived from the Greek word Astatos, meaning “unstable.” Only about 25 grams naturally occur in the world at any given time. Its existence was foretold in the 1800s, but it was finally discovered about 70 years later. Decades after its discovery, little is known about Astatine.
What is a Rare earth element?
Rare-earth elements (REEs) are used as high-tech equipment, including smartphones, digital cameras, computer hard disks, fluorescent lamps and light-emitting diodes (LEDs), flat-screen televisions, computer monitors, and electrical indicators.
Rare Earths is a group of 18 elements in the periodic table known as the Lanthanide series and Yttrium. Rare earth is divided into light compartments (lanthanum to samarium) and heavy elements (europium to lutetium). The latter is rare and therefore very expensive.
Dmitri Mendeleyev, a Russian chemist who in 1869 organized the elements into a periodic table that is still in use today, predicted the features of an unknown element that would fill a gap in the blank space on the periodic table for element No. 85, according to Peter van der Krogt. A Dutch historian. Mendeleyev named this element eka-iodine because of its direct subdivision of iodine directly into a group of halogen elements.
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Facts and Properties of Astatine
- It is the stain of uranium and thorium. The half-life duration of Astatine is only 8.1.
- Bismuth - 206 and Polonium-210 are the two isotopes of Astatine, and the formation of these isotopes depends on the process of decay.
- The atomic weight of this element is 210.
- According to research, only 25 grams of astatine occurs naturally in the Earth's crust.
- It is the heaviest known halogen and has similar properties to other halogen elements. These properties are that they are not metals, they have low boiling and melting points, are diatomaceous earth, are poor in electricity and heat conductors, and are brittle in solid form.
- Astatine is highly radioactive, but it does not threaten the environment and health because it is rare and short-lived.