Plutonium has a half life of 2.4 × 104 years. How long does it take for 99% of the plutonium to decay?
What is the binding energy of the 4He nucleus?
The mass of 1H is 1.007825 u and the mass of 1n is 1.008665 u. The mass of 12C is 12.000000 u.
What is the total binding energy of 12C?