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.
Radium | Description, Properties, Symbol, Uses, & Facts | Britannica
Dec 6, 2025 · radium (Ra), radioactive chemical element, the heaviest of the alkaline-earth metals of Group 2 (IIa) of the periodic table. Radium is a silvery white metal that does not occur free …
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 Facts - Element 88 Symbol Ra - Science Notes and Projects
Nov 11, 2023 · 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 discovered in …
Radium Facts and Chemical and Physical Properties - ThoughtCo
May 8, 2025 · Radium is a bright white metal that turns black when exposed to air and is very radioactive. Radium was discovered by Pierre and Marie Curie in 1898 and emits alpha, beta, …
Radium | Ra (Element) - PubChem
Chemical element, Radium, information from authoritative sources. Look up properties, history, uses, and more.
WebElements Periodic Table » Radium » the essentials
Pure metallic radium is brilliant white when freshly prepared, but blackens on exposure to air, probably due to formation of the nitride. It exhibits luminescence, as do its salts; it …
Periodic Table of Elements: Los Alamos National Laboratory
It is a member of the alkaline-earth group of metals. Radium imparts a carmine red color to a flame. Radium emits alpha, beta, and gamma rays and when mixed with beryllium produce …
Radium Element Facts - chemicool.com
The chemical element radium is classed as an alkali earth metal. It was discovered in 1898 by Marie S. Curie and her husband Pierre.
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.