Roentgenium is an artificial element, not found in the nature.
Roentgenium is an artificial chemical element.
Roentgenium (AN = 111) was found by a team led by Sigurd Hofmann in 1994. In 2001, his discovery was deemed to have insufficient evidence, but subsequent confirmation in 2002 led to the formal recognition in 2003.
Roentgenium has no uses.
Any food has roentgenium.
Roentgenium has no uses.
Roentgenium has no uses.
Roentgenium is a solid metal.
Any roentgenium exist in foods.
Roentgenium is a transition metal.
Roentgenium is not a commercial product.
Roentgenium is a solid metal.
Roentgenium has 111 electrons.