Roentgenium (German: [ʁœntˈɡeːni̯ʊm] ⓘ) is a synthetic chemical element; it has symbol Rg and atomic number 111. It is extremely radioactive and can only be created in a laboratory.

錀 （ lún ） （英語： Roentgenium ），是一種人工合成的化學元素，其化學符號为Rg，原子序數为111。錀是一種放射性極強的超重元素及錒系後元素，不出現在自然界中，只能在實驗室內以粒子加速器少量合成。

Element Roentgenium (Rg), Group 11, Atomic Number 111, d-block, Mass [280]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Roentgenium exists in solid form under normal conditions. It crystallizes in a cubic structure that has a body-centered symmetry. Roentgenium is thought to be a very dense metal and would have a density of round 28.7 g/cm 3 .

2020年1月24日 · Roentgenium (Rg) is element 111 on the periodic table. Few atoms of this synthetic element have been produced, but it is predicted to be a dense, radioactive metallic solid at room temperature. Here is a collection of interesting Rg facts, including its history, properties, uses, and atomic data. Wondering how to pronounce the element name?

All group 11 elements are relatively inert, corrosion -resistant metals. Copper and gold are colored, but silver is not. Roentgenium is expected to be silvery, though it has not been produced in large enough amounts to confirm this. These elements have …

Roentgenium is a chemical element with symbol Rg and atomic number 111. Classified as a transition metal, Roentgenium is a expected to be a solid at room temperature. [Rn] 7s 2 5f 14 6d 9 (predicted)

The chemical element roentgenium is classed as a transition metal. It was discovered in 1994 by research scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany. Roentgenium is named after Wilhelm Roentgen, who was awarded the first ever Physics Nobel Prize in 1901 for his discovery of x-rays.

A synthetic radioactive element, roentgenium (pronounced as runt-GEN-ee-əm), also known as unununium, is denoted by the symbol Rg [1, 2]. It is not found naturally and is only produced in the lab under controlled circumstances.

roentgenium (Rg), artificially produced transuranium element of atomic number 111. In 1994 scientists at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung [GSI]) in Darmstadt, Ger., formed atoms of element 111 when atoms of bismuth -209 were bombarded with atoms of nickel -62.