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Answer:
technetium
option a is correct
Explanation:
Technetium was the first artificially produced element. It was isolated by Carlo Perrier and Emilio Segrè in 1937.
Technetium was created by bombarding molybdenum atoms with deuterons that had been accelerated by a device called a cyclotron.
Number of Stable Isotopes: 0 ...
Symbol: Tc (43)
Atomic Number: 43
Atomic Weight: 98
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