ابحث
Rubidium-strontium dating
/ɹuːbˈɪdiəmstɹˈɒntiəm dˈeɪtɪŋ/
/ɹuːbˈɪdiəmstɹˈɑːntiəm dˈeɪɾɪŋ/Rubidium-strontium dating
01
geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years
مثال
