镭的英文简介

Radium, the atom ordinal number 88, atomic weight 2260254, is a kind of natural radio chemical element, the chemical element comes from Latin text, the original intention is" shoot the line".Resided the mile in 1898, the husband and wife discovered the radium from the asphalt uranium mineral mineral 渣 , separating 90 milligram chlorination radiums of in 1902, the first step measuresed the atomic weight of the radium.The radium distributes in the nature very widely, but the content is very tiny, content in the earth crust for 1/1,000,000,000, the total amount is about 18,000,000 tons.Have already discover now all isotopes of the radium that quantity counts to 206-230, among them only have the radium 223,224,226 and 228 is a natural radioisotope, the rest is all to respond through the artificial pit to synthesize of.226 half- lifes of radium are most long, the natural and plentiful degree is biggest, is the most important isotope of radium.
The radium is a white and