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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-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra 3 N 2).
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 characteristic property is its intense radioactivity, which causes compounds of the element to display a faint bluish glow in the dark.
Element Radium (Ra), Group 2, Atomic Number 88, s-block, Mass [226]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Radium is an alkaline earth metal. Radium has a melting point of 700°C, boiling point of 1140°C, specific gravity estimated to be 5, and valence of 2. Pure radium metal is bright white when freshly prepared, although it blackens upon exposure to air. The element decomposes in water.
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, solid at room temperature.
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 1898 by Marie and Pierre Curie from a uranium ore called pitchblende.
Radium is a highly radioactive element and can be extremely dangerous. However, it was once used in many everyday products, including wristwatches and toothpaste, and thought to have...