Neptunium is a metal, and therefore it can in theory form all the usual kinds of compounds that metals form; it could combine with oxygen and form neptunium oxide. However, neptunium is a radioactive element with a very short half-life, therefore it does not stick around long enough to engage in chemical reactions, or even if it did, the resulting compound would also exist only for a very brief period of time.
Synthesis
Americium decays into neptunium-239 through alpha decay. It has a half-life of 7,370 years.
A compound or compound substance.
neptunium
Neptunium, with the chemical symbol Np, is the chemical element with the atomic number 93.
Neptunium is a chemical element.
When one element is combined with another element, a chemical compound results. The elements are chemically bonded together to make this compound.
A compound of magnesium.
That's because of the way "compound" is defined. If atoms of an element combine with other atoms of the SAME element, then it's not called a "compound".
Neptunium is a transuranic element, meaning that it has so many protons that it does not occur in nature. Most commonly Neptunium is a byproduct of nuclear reactions and attempts to create Plutonium (another transuranic element).
Yes, neptunium is an artificial chemical element.
Neptunium is an individual element; isotopes of neptunium are not separated.
sodium, combined with chlorine, it makes salt, but in pure form, it explodes in water
synthesis
Neptunium-237 decay to protactinium-233.Each other isotope has another schema of decay.
Neptunium is an artificial element; it is not mined.
Neptunium is a ductile metal.