Radium - Wikipedia
Radium is a chemical element; it has symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery …
镭 - 维基百科，自由的百科全书
226 Ra是镭最稳定的同位素，也是铀衰变链中最后一种半衰期超过一千年的核素，几乎组成了所有的天然镭。 226 Ra衰变产物是放射性 惰性气体 氡 同位素 222 Rn，是环境中镭危害的主要来 …
Radium | Description, Properties, Symbol, Uses, & Facts | Britannica
Radium is a radioactive chemical element that is the heaviest of the alkaline-earth metals of the periodic table. Radium is a silvery white metal that does not occur free in nature. Its most …
Radium | Ra (Element) - PubChem
Radium is a chemical element with symbol Ra and atomic number 88. Classified as a n alkaline earth metal, Radium is a solid at room temperature. [Rn]7s 2. J.C. Slater, J Chem Phys, 1964, …
Radium - Element information, properties and uses | Periodic Table
Element Radium (Ra), Group 2, Atomic Number 88, s-block, Mass [226]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Radium Element Facts - chemicool.com
Radium is a silvery-white metal. It is highly radioactive and its decay product, radon gas, is also radioactive. One result of radium’s intense radioactivity is that the metal and its compounds …
Radium Facts – Element 88 Symbol Ra - Science Notes and Projects
2023年11月11日 · Radium is a chemical element with the symbol Ra and atomic number 88. It is an alkaline earth metal and is the heaviest of the alkaline earth metals. Radium was …
Radium Element | History, Uses, Facts, Physical Chemical …
Radium is a radioactive element of the alkaline earth series of metals. Radium is silvery, lustrous, soft and radioactive element. Its atomic symbol Ra, atomic number 88, atomic weight 226, …
radium | FactMonster
Radium is a lustrous white radioactive metal. It is an alkaline-earth metal; in its chemical properties it closely resembles barium, the element above it in Group 2 of the periodic table. …
Radium, Chemical Element - uses, elements, metal, gas, number, …
Radium is a brilliant white metal with a melting point of 700°C (1,300°F) and a boiling point of 1,737°C (3,159°F). Its density is 5.5 grams per cubic centimeter.