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Radium was discovered in 1898 by Marie Curie and Pierre Curie. They managed to extract 1 mg of radium from ten tonnes of the uranium ore pitchblende (uranium oxide, U₃O₈), a considerable feat, given the chemically methods of separation available to them. They identified that it was a new element because its atomic spectrum revealed new lines. Their samples glowed with a faint blue light in the dark, caused by the intense radioactivity exciting the surrounding air.

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• Radium is a metal
• More specifically Radium is alkali earth metal
• Abundance on Earth crust- 9.9x10-12%
• Density(g cm-3)- 5
• Melting point-1,285°F

696°C
Boiling point- 3,159°F 1,737°C

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Radium was first found in Bohemia in the rich pitchblence ore.  Some can also be found in the Carnotite sands of Colorado, although richer supplies exist in regions of Zaire, Africa and the Great Bear Lake region of Canada.

Radium is present in all uranium metals, and can be extracted from the waste products of uranium processing.

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A mixture of radium and beryllium will emit neutrons and is used as a neutron source. Radium is used to produce radon, a radioactive gas used to treat some types of cancer. A single gram of radium-226 will produce 0.000l milliliters of radon a day. Radium is about one million times more active than uranium.

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Radium (88Ra) has no stable or nearly stable isotopes, and thus a standard atomic weight cannot be given. The longest lived, and most common, isotope of radium is 226Ra with a half-life of 1,600 years. Ra occurs in the decay chain of 238U (often referred to as the radium series.)

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In conclusion radium is a very important element. According to the Los Alamos National Laboratory, radium is used to produce radon gas, which is typically used to treat several diseases including cancer. Radium is an unstable element and undergoes several stages of radioactive decay reaching its end product of lead.

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Learn about the fascinating story behind Radium by listening to Chemistry World's 'Chemistry in its element' podcast

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Explore this collection of videos on each element in the periodic table. Featuring Murray Robertson's Visual Elements annimated artwork and videos from the University of Nottingham's Periodic Table of Videos.

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http://www.rsc.org/periodic-table/element/88/radiumhttp://www.rsc.org/periodic-table/element/88/radium

https://en.m.wikipedia.org/wiki/Radium

https://www.google.com/search?client=safari&channel=iphone_bm&biw=375&bih=553&tbm=isch&sa=1&ei=wdj3WbPcMJPMjwOBqIKoBg&q=radium+&oq=radium+&gs_l=mobile-gws-img.12..35i39k1l3j0l2.16599.17124.0.17769.5.5.0.0.0.0.119.448.0j4.4.0....0...1.1.64.mobile-gws-img..1.4.448...0i30k1j0i8i30k1.106.NRZzFMBAZZc

http://www.funnycaptions.com/tag/radium-jokes/