ストロンチウムの同位体
1. Isotopes of strontiumThe alkaline earth metal strontium (Sr) has four stable, naturally occurring isotopes: Sr (0.56%), Sr (9.86%), Sr (7.0%) and Sr (82.58%). It has a standard atomic mass of 87.62(1) u. Only Sr is radiogenic; it is produced by decay from the radioactive alkali metal Rb, which has a half-life of 4.88 × 10 years. Thus, there are two sources of Sr in any material: that formed during primordial nucleo-synthesis along with Sr, Sr and Sr, as well as that formed by radioactive decay of Rb.
Read “Isotopes of strontium” on English Wikipedia
Read “ストロンチウムの同位体” on Japanese Wikipedia
Read “Isotopes of strontium” on DBpedia
Read “Isotopes of strontium” on English Wikipedia
Read “ストロンチウムの同位体” on Japanese Wikipedia
Read “Isotopes of strontium” on DBpedia
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