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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 Properties Protactinium (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-bl

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 Name Protactinium was discovered in 1913. Its name derives from Greek words meaning "pre-actinium," as it exhibits properties very similar to the element actinium. Properties Protactinium is a metallic and radioactive element. It has a silvery appearance but is extremely rare in nature. Its chemical propertie