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Há 6 dias · Technetium, with atomic number Z = 43, is the lowest-numbered element in the periodic table for which all isotopes are radioactive. The second-lightest exclusively radioactive element, promethium, has atomic number 61.
Há 4 dias · Curium is a synthetic chemical element; it has symbol Cm and atomic number 96. This transuranic actinide element was named after eminent scientists Marie and Pierre Curie, both known for their research on radioactivity.
Há 4 dias · An extended periodic table theorizes about chemical elements beyond those currently known and proven. The element with the highest atomic number known is oganesson ( Z = 118), which completes the seventh period (row) in the periodic table. All elements in the eighth period and beyond thus remain purely hypothetical.
Há 2 dias · It has the second-highest atomic number and joint-highest atomic mass of all known elements, and is the penultimate element of the 7th period of the periodic table. The discovery of tennessine was officially announced in Dubna , Russia, by a Russian–American collaboration in April 2010, which makes it the most recently discovered ...
Há 3 dias · Plutonium is a key component in nuclear weapons. Plutonium, an actinide, is a crucial element in the production of nuclear weapons. Its ability to sustain a chain reaction has made it highly valuable in both peaceful and military nuclear programs. Actinides are vital for scientific research.
Há 4 dias · Tellurium. hexagonal [4] ( hP3) Tellurium is a chemical element; it has symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens.
Há 1 dia · Iron is a chemical element; it has symbol Fe (from Latin ferrum 'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core.
