None occur naturally since neptunium (Np) is not known to occur naturally. Common, reasonably stable, salts of Np include the nitrate, sulfate and chloride (sonitrogen, sulfur and chlorine). Neptunium can also be synthesized as the dioxide and the hydroxide (NpO2, NpOH)
Neptunium is a member of the actinides group.
Neptunium is a reactive metal and can react with the majority of non metals.
As all the chemical elements neptunium contain protons, neutrons and electrons.
Neptunium is a member of the actinoids family.
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Neptunium is an individual element; isotopes of neptunium are not separated.
Neptunium can react with the majority of other nonmetals.
Neptunium itself is an element, the simplest form of matter.
Yes.
Neptunium is a member of the actinides group.
Neptunium is a reactive metal and can react with the majority of non metals.
As all the chemical elements neptunium contain protons, neutrons and electrons.
All the elements before neptunium are found in the nature. Also neptunium can be found in the nature only in ultratraces resulting from nuclear weapons experiments or other experiments.
Neptunium is a member of the actinoids family.
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Manmade elements. These have traditionally been considered to be: Technetium, Promethium, Neptunium, and all elements beyond Neptunium. However trace levels of several of these have since then been detected naturally.
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).