Promethium was identified and prepared for the first time in 1945, at Oak Ridge, USA by Jacob A. Marinsky, Lawrence E. Glendenin, Charles D.Coryell, Harold G. Richter.
Hydrogen was discovered first in 1766, while promethium was discovered much later in 1945.
Promethium is an artificial chemical element discovered in burned uranium fuels as a fission product.
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.
All chemical elements after uranium and promethium, technetium.
Promethium is a chemical element, atomic number 61.
It was first discovered by Jacob A. Marinsky, along with a few other scientists in 1944. But he did not make his claim of Promethium until 1946. The place Promethium was first discovered is still unknown to me...
Promethium is today the unique name for this chemical element.
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.