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Mendelevium is a synthetic and radioactive metallic element with atomic number 101 and chemical symbol Md, located in the actinide series of the periodic table. Due to its production in extremely small quantities and high radioactivity, its properties are largely based on theoretical studies and limited experiments.Classification and Basic PropertiesMendelevium is classified as the 13th element in the actinide series and is located in the 7th period of the periodic table. Its electron configurat

Protactinium is a radioactive metal with atomic number 91 belonging to the actinide series. This silvery element was discovered in 1913 and derives its name from the Greek word "protos," meaning "first."Classification and Basic PropertiesProtactinium (Pa) is an element located in the seventh period of the periodic table within the actinide group. Its electron configuration is [Rn] 5f²6d¹7s². This electronic structure determines its chemical properties and confirms its classification as an f-bloc

Protactinium is a rare and radioactive element in the periodic table. It occurs in very small amounts in nature, and scientists study it in laboratories for research purposes.Discovery and NameProtactinium was discovered in 1913. Its name derives from Greek words meaning "pre-actinium," as it exhibits properties very similar to the element actinium.PropertiesProtactinium is a metallic and radioactive element. It has a silvery appearance but is extremely rare in nature. Its chemical properties ar

Plutonium is a radioactive, silvery metal belonging to the actinide series. With an atomic number of 94, this element is particularly known for its use in the production of nuclear weapons and as a power source in spacecraft.Classification and Basic PropertiesPlutonium (Pu) is an element located in the 7th period of the periodic table within the actinide group. Its electron configuration is [Rn]5f⁶7s². This structure indicates that plutonium is a member of the f-block elements and that its chemi

Actinium is a silvery-white, soft, and highly radioactive metal with atomic number 89 and serves as the starting point of the actinium series. It was discovered in 1899 by André-Louis Debierne and derives its name from the Greek word "actinos," meaning "ray."Classification and Fundamental PropertiesActinium (Ac) is located in the seventh period of the periodic table and is generally regarded as the first element of the actinium series. Its electron configuration is [Rn] 6d¹7s², which determines