Chemistry, 16.01.2020 00:31 dancemomsrule1
The following table shows the currently accepted half-life values for six parent isotopes.
parent isotope currently accepted half-life values
uranium-238 4.5 billion years
uranium-235 704 million years
thorium-232 14.0 billion years
rubidium-87 48.8 billion years
potassium-40 1.25 billion years
samarium-147 106 billion years
earth is approximately 4.5 billion years old. given this information and the data in the table, which of the following isotopes could today contain less than 50 percent of its parent isotope?
potassium-40
rubidium-87
samarium-147
uranium-238
Answers: 1
Chemistry, 22.06.2019 10:00, JOEFRESH10
Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer
Answers: 1
The following table shows the currently accepted half-life values for six parent isotopes.
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