Radium Ra · 88
solid metal · period 7, group 2 · s-block
Anatomy
Transliteration. The phonetic half approximates the international name. Radium
History of the character
Every form found in the sources, from the first missionary chemistry books of the 1850s to the current standards. Hover a dot for the source. Simplified 镭, traditional 鐳.
- 1920 鈤 rì 曾提議 Proposed, not adopted, Various clashed with the same character used for germanium
- 1933 鐳 léi 化學命名原則 Principles of Chemical Nomenclature, Zhèng Zhènwén (鄭貞文), National Institute for Compilation and Translation
Homophones
No other element shares this syllable.
Elsewhere
Japanese ラジウム Korean 라듐 Vietnamese radi
Western name from Latin via French radius, “ray”. Compare all
Unicode
U+956D in CJK Unified Ideographs