A radioactive decay of element X (Z = 90) is 30 % complete in 30 minutes. It has a half-life period of ……………
A. 24.3 min
B. 58.3 min
C. 102.3 min
D. 120.3 min
Answer:B
A radioactive decay of element X (Z = 90) is 30 % complete in 30 minutes. It has a half-life period of ……………
A. 24.3 min B. 58.3 min C. 102.3 min D. 120.3 min