atomic number 85
Noun: - A highly unstable radioactive chemical element: This is a synthetic element, the heaviest member of the halogen group in the periodic table. It is produced artificially as a decay product of uranium and thorium. Its most stable isotope has a very short half-life.
This term is used exclusively in scientific contexts, particularly in chemistry, nuclear physics, and materials science, to refer to this specific element. - The laboratory synthesized a minute quantity of atomic number 85 for research. - In the periodic table, atomic number 85 is placed below iodine.
- In nuclear decay chains: The element is identified and studied within the sequences of radioactive decay from heavier elements like uranium-235 and thorium-232.
- Trace amounts of atomic number 85 can be found in uranium ores due to decay processes.
- Astatine: This is the name of the element with atomic number 85. The symbol is At.
- Astatine (At) is so rare that its entire crustal abundance is estimated to be less than one ounce at any given time.
- Halogen: The group of elements to which atomic number 85 belongs, which also includes fluorine, chlorine, bromine, and iodine.
- Astatine: The standard name for the element.
- Element 85: A numerical designation synonymous with the atomic number.
The term "atomic number 85" is a definitive identifier based on the number of protons in the nucleus of its atoms. It emphasizes the element's position in the periodic table rather than its chemical properties, which are difficult to observe due to its extreme instability and rarity.
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a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
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