Within a few days, they had found einsteinium, element 99.
From the latimes.com
In February 1955, the team created mendelevium, element 101, by bombarding einsteinium in the Berkeley cyclotron.
From the latimes.com
Einsteinium is a metallic synthetic element.
From the en.wikipedia.org
Produced by intensely concentrated neutron flux about the detonation site were two new elements, einsteinium and fermium.
From the en.wikipedia.org
Because the most recently discovered transuranium elements decompose quickly, the scientists hurriedly analyzed the einsteinium target after the bombardment.
From the time.com
Although ununennium, which is probably the seventh alkali metal, has not been discovered yet, its synthesis has been attempted through the nuclear fusion of einsteinium and calcium.
From the en.wikipedia.org
More examples
A radioactive transuranic element produced by bombarding plutonium with neutrons
Einsteinium is a metallic synthetic element. On the periodic table, it is represented by the symbol Es and atomic number 99. It is the seventh transuranic element, and an actinide. It was named in honor of Albert Einstein.
A transuranic chemical element (symbol Es) with atomic number 99