For the first preparation of neptunium the nuclear reaction was:
U-238 + n --------------- U-239---------------Np-239
No, neptunium is not a naturally occurring element. It is a synthetic element that was first produced in a laboratory setting in 1940.
Assuming you mean man[made], no. Trace amounts of neptunium are found in uranium ores in Nature.
Neptunium was obtained for the first time by Edwin McMillan and Philip H. Abelson in 1940 at Berkeley Laboratories.
Edwin McMillan and Philip Abelson obtained for the first time neptunium in 1940 at Berkeley Radiation Laboratories, USA.
Neptunium trifluoride is an intermediate for the preparation of neptunium metal.
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.