Assuming you mean man[made], no. Trace amounts of neptunium are found in uranium ores in Nature.
No, neptunium is not a naturally occurring element. It is a synthetic element that was first produced in a laboratory setting in 1940.
Neptunium is a solid metal, radioactive, man made (naturally exist only in very low concentrations in uranium ores), many isotopes are known (the most important is neptunium-237), etc. See also the link below for details.
Neptunium trifluoride is an intermediate for the preparation of neptunium metal.
Neptunium exist in nature in: - uranium ores, in extremely traces concentrations - in areas of past nuclear weapons tests
Neptunium is a metal.
The three common compounds of neptunium are neptunium dioxide (NpO2), neptunium trichloride (NpCl3), and neptunium tetrafluoride (NpF4).
Neptunium is an individual element; isotopes of neptunium are not separated.
Neptunium(IV) oxide or neptunium dioxide is the chemical compound composed of neptunium and oxygen with the formula NpO2. It forms dark olive[4] green cubic crystals[1].
Yes, neptunium is a metal.
Neptunium is not in foods.
No use today; neptunium trifluoride is used to prepare neptunium metal.
Neptunium is an artificial element.Amounts of natural neptunium are absolutely nonsignificant.