What element did Segrè discover in 1937?
Technetium
Astatine
Plutonium
Uranium
Answer
Technetium, discovered by Emilio Segrè in 1937, holds the distinction of being the first artificially created element. Its atomic number, 43, places it in the transition metal group. Despite its synthetic origin, technetium has found practical applications in medical imaging, particularly in bone scans. Its radioactive isotope, technetium-99m, emits gamma rays that can be detected by a scanner, providing valuable information about bone health.
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