Yes. It has been observed in the spectrum of certain stars, thus it occurs in the universe making it a natural element.
Promethium is a natural chemical element. But because exist in nature only in ultratraces it is artificially prepared.
Although promethium exist in traces in the Earth crust it is an artificial element.
Promethium is not flammable.
Promethium is a rare artificial element.
Promethium is a rare artificial element.
Promethium is a rare artificial element.
Promethium is a chemical element, a metal.
Promethium is a chemical element, atomic number 61.
Promethium is a transition element. It is the only element in the lanthanide series that is radioactive and does not occur naturally on Earth. Its atomic number is 61, and it is commonly used in nuclear batteries and research applications.
Promethium is today the unique name for this chemical element.
Yes, Promethium is a radioactive element that is paramagnetic, meaning it is weakly attracted to magnetic fields.
Promethium belongs in the 7th family. The 7th family is The Lanthanide family.