In a sample of a radioactive substance, what percentage decays in one mean lifetime?
A. 70 %
B. 63.2 %
C. 45.8 %
D. 23%
Answer:B
In a sample of a radioactive substance, what percentage decays in one mean lifetime?
A. 70 % B. 63.2 % C. 45.8 % D. 23%