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What the name means: Neptunium was named after the planet Neptune (itself named after the Roman god of the sea). Since neptunium is placed directly after uranium in the periodic table, it seemed fitting that element # 93 should be named after the next planet after Uranus.
Who identified neptunium?: Edwin Mattison McMillan and Philip Abelson who worked at the Berkeley Laboratory of the University of California. Neptunium was produced by bombarding uranium atoms with neutrons.
STP = standard temperature and pressure.
About neptunium: Neptunium is found naturally in trace amounts in uranium ores. However, most neptunium is produced in nuclear reactors.
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