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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

Ytterbium is a soft, silvery metal with atomic number 70, belonging to the lanthanide series. It was discovered in 1878 by Swiss chemist Jean-Charles Galissard de Marignac and named after Ytterby, the Swedish village where it was first identified.Classification and Basic PropertiesYtterbium (Yb) is an element located in the sixth period of the periodic table within the lanthanide group. Its electron configuration is [Xe] 4f¹⁴6s². This fully filled 4f shell causes certain properties of ytterbium

Flerovium is a synthetic and highly radioactive element located at position 114 in the periodic table. It was discovered in 1999 and named after the Russian nuclear physicist Georgy Flerov. Most of its properties are based on observations of the very small number of atoms produced to date and theoretical calculations.Classification and Fundamental PropertiesFlerovium (Fl) is located in period 7 and group 14 (carbon group) of the periodic table. Its expected electron configuration is [Rn] 5f¹⁴ 6d

Californium is a synthetic, radioactive metallic element with atomic number 98 and chemical symbol Cf, located in the actinide series of the periodic table. It is named after the University of California in the United States, where it was first synthesized.Classification and Basic PropertiesCalifornium is classified as the 10th element in the actinide group and is situated in the 7th period of the periodic table. Its electron configuration is [Rn]5f¹⁰7s². All known isotopes are radioactive due t

Neptunium is a radioactive metal belonging to the actinide series. Discovered in 1940, this element is named after the planet Neptune and is primarily obtained as a byproduct in nuclear reactors.Classification and Basic PropertiesNeptunium (Np) is an element located in the seventh period of the periodic table within the actinide series. Its atomic number is 93. Its electron configuration is [Rn] 5f⁴6d¹7s². This configuration indicates that neptunium is an f-block element and that its chemical pr

Samarium is a metallic element in the lanthanide series, with an atomic number of 62 and a silvery-white appearance. It was discovered in 1879 by French chemist Paul-Émile Lecoq de Boisbaudran, who isolated it from the mineral samarskite. The element is named after this mineral, and indirectly after its discoverer, Russian mining engineer Colonel Vasili Samarsky-Bykhovets. Samarium is particularly used in the production of strong permanent magnets, lasers, and nuclear technology.Classification a

Astatine is an extremely radioactive element located at position 85 in the periodic table. It was first synthesized and discovered in 1940 by a team at the University of California. Astatine derives its name from the Greek word "astatos," meaning "unstable," and is the rarest element naturally occurring in the Earth's crust. Due to its high radioactivity and instability, its properties have been studied largely through theoretical calculations and in trace quantities.Classification and Fundament

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

Gadolinium is a silvery-white metal with atomic number 64, belonging to the lanthanide series. It was discovered in 1880 by the Swiss chemist Jean Charles Galissard de Marignac and named after the Finnish chemist Johan Gadolin. It is particularly used for its magnetic properties in nuclear reactors and medical imaging applications.Classification and Basic PropertiesGadolinium (Gd) is an element located in the 6th period of the periodic table within the lanthanide group. Its electron configuratio