materialsscienceandengineering:
Rubidium is frequently used in dating rocks by judging the ratio of rubidium to strontium because the element’s radioactive isotope, Rb-87, decays to strontium, Sr-87, over time.
Космический трэк пространственных событий Тайны Мира, НЛО пришельцы, наука, космос, древние, мегалиты, археология.
materialsscienceandengineering:
Rubidium is frequently used in dating rocks by judging the ratio of rubidium to strontium because the element’s radioactive isotope, Rb-87, decays to strontium, Sr-87, over time.
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