Question

9select the correct answer from each drop-down menu. The High Life of the radioactive element beryllium 13 is
`5 * {10}^(10)`seconds, and half life of the radioactive element beryllium 15 is
`2 * 10 {}^(7)`seconds. The half-life of _____ is ______ X greater than half life of _____.

Answer 1

In this problem, divide the half life of the radioactive element beryllium 15 by the half life of the radioactive element beryllium 13

so

`(2\cdot10^((-7)))/(5\cdot10^((-10)))=0.4\cdot10^3=400`

therefore

The half-life of radioactive element beryllium 15 is 400 times greater than half life of he radioactive element beryllium 13