7. A radioisotope X has a half life time of 10 years. A sample has an initial decay rate of 1.38 x 1
問題詳情
7. A radioisotope X has a half life time of 10 years. A sample has an initial decay rate of 1.38 x 10:3decay/year. How many nuclei decay in 10 years? (In 2 = 0.69) (A) 1011 (B) 1012 (C) 1013 (D) 1014 (E) 1015.